diff --git a/examples/arduino/z_pub.ino b/examples/arduino/z_pub.ino
index 3e3be23c7..243aaa2f2 100644
--- a/examples/arduino/z_pub.ino
+++ b/examples/arduino/z_pub.ino
@@ -64,7 +64,8 @@ void setup() {
 
     // Open Zenoh session
     Serial.print("Opening Zenoh Session...");
-    z_owned_session_t s = z_open(z_config_move(&config));
+    z_owned_session_t s;
+    z_open(&s, z_config_move(&config));
     if (!z_session_check(&s)) {
         Serial.println("Unable to open session!");
         while (1) {
diff --git a/examples/arduino/z_pull.ino b/examples/arduino/z_pull.ino
index 26478d740..c2f5bf643 100644
--- a/examples/arduino/z_pull.ino
+++ b/examples/arduino/z_pull.ino
@@ -77,7 +77,8 @@ void setup() {
 
     // Open Zenoh session
     Serial.print("Opening Zenoh Session...");
-    z_owned_session_t s = z_open(z_config_move(&config));
+    z_owned_session_t s;
+    z_open(&s, z_config_move(&config));
     if (!z_session_check(&s)) {
         Serial.println("Unable to open session!");
         while (1) {
diff --git a/examples/arduino/z_queryable.ino b/examples/arduino/z_queryable.ino
index adfb3a439..fe174fdeb 100644
--- a/examples/arduino/z_queryable.ino
+++ b/examples/arduino/z_queryable.ino
@@ -75,7 +75,8 @@ void setup() {
 
     // Open Zenoh session
     Serial.print("Opening Zenoh Session...");
-    z_owned_session_t s = z_open(z_config_move(&config));
+    z_owned_session_t s;
+    z_open(&s, z_config_move(&config));
     if (!z_session_check(&s)) {
         Serial.println("Unable to open session!");
         while (1) {
diff --git a/examples/arduino/z_scout.ino b/examples/arduino/z_scout.ino
index 632b50295..33102754e 100644
--- a/examples/arduino/z_scout.ino
+++ b/examples/arduino/z_scout.ino
@@ -114,7 +114,8 @@ void setup() {
 void loop() {
     int *context = (int *)malloc(sizeof(int));
     *context = 0;
-    z_owned_scouting_config_t config = z_scouting_config_default();
+    z_owned_scouting_config_t config;
+    z_scouting_config_default(&config);
     z_owned_closure_hello_t closure = z_closure_hello(callback, drop, context);
     printf("Scouting...\n");
     z_scout(z_scouting_config_move(&config), z_closure_hello_move(&closure));
diff --git a/examples/arduino/z_sub.ino b/examples/arduino/z_sub.ino
index e4d847a64..9a707958d 100644
--- a/examples/arduino/z_sub.ino
+++ b/examples/arduino/z_sub.ino
@@ -73,7 +73,8 @@ void setup() {
 
     // Open Zenoh session
     Serial.print("Opening Zenoh Session...");
-    z_owned_session_t s = z_open(z_config_move(&config));
+    z_owned_session_t s;
+    z_open(&s, z_config_move(&config));
     if (!z_session_check(&s)) {
         Serial.println("Unable to open session!");
         while (1) {
diff --git a/examples/espidf/z_get.c b/examples/espidf/z_get.c
index 57a10d1e9..9f7c1115e 100644
--- a/examples/espidf/z_get.c
+++ b/examples/espidf/z_get.c
@@ -141,7 +141,8 @@ void app_main() {
 
     // Open Zenoh session
     printf("Opening Zenoh Session...");
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         exit(-1);
diff --git a/examples/espidf/z_pub.c b/examples/espidf/z_pub.c
index a793c0b1f..95280b39f 100644
--- a/examples/espidf/z_pub.c
+++ b/examples/espidf/z_pub.c
@@ -128,7 +128,8 @@ void app_main() {
 
     // Open Zenoh session
     printf("Opening Zenoh Session...");
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         exit(-1);
diff --git a/examples/espidf/z_pull.c b/examples/espidf/z_pull.c
index 11e0d51a3..c96c1de38 100644
--- a/examples/espidf/z_pull.c
+++ b/examples/espidf/z_pull.c
@@ -135,7 +135,8 @@ void app_main() {
 
     // Open Zenoh session
     printf("Opening Zenoh Session...");
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         exit(-1);
diff --git a/examples/espidf/z_queryable.c b/examples/espidf/z_queryable.c
index dd1d1ae04..9083658be 100644
--- a/examples/espidf/z_queryable.c
+++ b/examples/espidf/z_queryable.c
@@ -137,7 +137,8 @@ void app_main() {
 
     // Open Zenoh session
     printf("Opening Zenoh Session...");
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         exit(-1);
diff --git a/examples/espidf/z_sub.c b/examples/espidf/z_sub.c
index 3793c2201..10456c866 100644
--- a/examples/espidf/z_sub.c
+++ b/examples/espidf/z_sub.c
@@ -134,7 +134,8 @@ void app_main() {
 
     // Open Zenoh session
     printf("Opening Zenoh Session...");
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         exit(-1);
diff --git a/examples/freertos_plus_tcp/z_get.c b/examples/freertos_plus_tcp/z_get.c
index 2ac6ca289..789d790b9 100644
--- a/examples/freertos_plus_tcp/z_get.c
+++ b/examples/freertos_plus_tcp/z_get.c
@@ -57,7 +57,8 @@ void app_main(void) {
     }
 
     printf("Opening session...\n");
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         return;
diff --git a/examples/freertos_plus_tcp/z_pub.c b/examples/freertos_plus_tcp/z_pub.c
index 32ad9bb91..ea7b026d0 100644
--- a/examples/freertos_plus_tcp/z_pub.c
+++ b/examples/freertos_plus_tcp/z_pub.c
@@ -40,7 +40,8 @@ void app_main(void) {
     }
 
     printf("Opening session...\n");
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         return;
diff --git a/examples/freertos_plus_tcp/z_pub_st.c b/examples/freertos_plus_tcp/z_pub_st.c
index bb3a1840b..058ad1b20 100644
--- a/examples/freertos_plus_tcp/z_pub_st.c
+++ b/examples/freertos_plus_tcp/z_pub_st.c
@@ -41,7 +41,8 @@ void app_main(void) {
     }
 
     printf("Opening session...\n");
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         return;
diff --git a/examples/freertos_plus_tcp/z_pull.c b/examples/freertos_plus_tcp/z_pull.c
index 1ce442e00..4cdbe244a 100644
--- a/examples/freertos_plus_tcp/z_pull.c
+++ b/examples/freertos_plus_tcp/z_pull.c
@@ -46,7 +46,8 @@ void app_main(void) {
     }
 
     printf("Opening session...\n");
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         return;
diff --git a/examples/freertos_plus_tcp/z_put.c b/examples/freertos_plus_tcp/z_put.c
index 2b134aae7..e03624565 100644
--- a/examples/freertos_plus_tcp/z_put.c
+++ b/examples/freertos_plus_tcp/z_put.c
@@ -38,7 +38,8 @@ void app_main(void) {
     }
 
     printf("Opening session...\n");
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         return;
diff --git a/examples/freertos_plus_tcp/z_queryable.c b/examples/freertos_plus_tcp/z_queryable.c
index 6bfdd1f3b..ff3f96d61 100644
--- a/examples/freertos_plus_tcp/z_queryable.c
+++ b/examples/freertos_plus_tcp/z_queryable.c
@@ -53,7 +53,8 @@ void app_main(void) {
     }
 
     printf("Opening session...\n");
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         return;
diff --git a/examples/freertos_plus_tcp/z_sub.c b/examples/freertos_plus_tcp/z_sub.c
index af32e1f2b..fd166e24d 100644
--- a/examples/freertos_plus_tcp/z_sub.c
+++ b/examples/freertos_plus_tcp/z_sub.c
@@ -45,7 +45,8 @@ void app_main(void) {
     }
 
     printf("Opening session...\n");
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         return;
diff --git a/examples/freertos_plus_tcp/z_sub_st.c b/examples/freertos_plus_tcp/z_sub_st.c
index ebcf180bc..8e53e3f26 100644
--- a/examples/freertos_plus_tcp/z_sub_st.c
+++ b/examples/freertos_plus_tcp/z_sub_st.c
@@ -49,7 +49,8 @@ void app_main(void) {
     }
 
     printf("Opening session...\n");
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         return;
diff --git a/examples/mbed/z_get.cpp b/examples/mbed/z_get.cpp
index 905ac4e1c..0fe71405b 100644
--- a/examples/mbed/z_get.cpp
+++ b/examples/mbed/z_get.cpp
@@ -52,7 +52,8 @@ int main(int argc, char **argv) {
     net.connect();
 
     // Initialize Zenoh Session and other parameters
-    z_owned_config_t config = z_config_default();
+    z_owned_config_t config;
+    z_config_default(&config);
     zp_config_insert(z_config_loan(&config), Z_CONFIG_MODE_KEY, z_string_make(MODE));
     if (strcmp(CONNECT, "") != 0) {
         zp_config_insert(z_config_loan(&config), Z_CONFIG_CONNECT_KEY, z_string_make(CONNECT));
@@ -60,7 +61,8 @@ int main(int argc, char **argv) {
 
     // Open Zenoh session
     printf("Opening Zenoh Session...");
-    z_owned_session_t s = z_open(z_config_move(&config));
+    z_owned_session_t s;
+    z_open(&s, z_config_move(&config));
     if (!z_session_check(&s)) {
         printf("Unable to open session!\n");
         exit(-1);
diff --git a/examples/mbed/z_pub.cpp b/examples/mbed/z_pub.cpp
index 0fb939071..2cc28df22 100644
--- a/examples/mbed/z_pub.cpp
+++ b/examples/mbed/z_pub.cpp
@@ -39,7 +39,8 @@ int main(int argc, char **argv) {
     net.connect();
 
     // Initialize Zenoh Session and other parameters
-    z_owned_config_t config = z_config_default();
+    z_owned_config_t config;
+    z_config_default(&config);
     zp_config_insert(z_config_loan(&config), Z_CONFIG_MODE_KEY, z_string_make(MODE));
     if (strcmp(CONNECT, "") != 0) {
         zp_config_insert(z_config_loan(&config), Z_CONFIG_CONNECT_KEY, z_string_make(CONNECT));
@@ -47,7 +48,8 @@ int main(int argc, char **argv) {
 
     // Open Zenoh session
     printf("Opening Zenoh Session...");
-    z_owned_session_t s = z_open(z_config_move(&config));
+    z_owned_session_t s;
+    z_open(&s, z_config_move(&config));
     if (!z_session_check(&s)) {
         printf("Unable to open session!\n");
         exit(-1);
diff --git a/examples/mbed/z_pull.cpp b/examples/mbed/z_pull.cpp
index 24acaeaec..c32ea6b68 100644
--- a/examples/mbed/z_pull.cpp
+++ b/examples/mbed/z_pull.cpp
@@ -46,7 +46,8 @@ int main(int argc, char **argv) {
     net.connect();
 
     // Initialize Zenoh Session and other parameters
-    z_owned_config_t config = z_config_default();
+    z_owned_config_t config;
+    z_config_default(&config);
     zp_config_insert(z_config_loan(&config), Z_CONFIG_MODE_KEY, z_string_make(MODE));
     if (strcmp(CONNECT, "") != 0) {
         zp_config_insert(z_config_loan(&config), Z_CONFIG_CONNECT_KEY, z_string_make(CONNECT));
@@ -54,7 +55,8 @@ int main(int argc, char **argv) {
 
     // Open Zenoh session
     printf("Opening Zenoh Session...");
-    z_owned_session_t s = z_open(z_config_move(&config));
+    z_owned_session_t s;
+    z_open(&s, z_config_move(&config));
     if (!z_session_check(&s)) {
         printf("Unable to open session!\n");
         exit(-1);
diff --git a/examples/mbed/z_queryable.cpp b/examples/mbed/z_queryable.cpp
index b0b9358bf..96a71f320 100644
--- a/examples/mbed/z_queryable.cpp
+++ b/examples/mbed/z_queryable.cpp
@@ -48,7 +48,8 @@ int main(int argc, char **argv) {
     net.connect();
 
     // Initialize Zenoh Session and other parameters
-    z_owned_config_t config = z_config_default();
+    z_owned_config_t config;
+    z_config_default(&config);
     zp_config_insert(z_config_loan(&config), Z_CONFIG_MODE_KEY, z_string_make(MODE));
     if (strcmp(CONNECT, "") != 0) {
         zp_config_insert(z_config_loan(&config), Z_CONFIG_CONNECT_KEY, z_string_make(CONNECT));
@@ -56,7 +57,8 @@ int main(int argc, char **argv) {
 
     // Open Zenoh session
     printf("Opening Zenoh Session...");
-    z_owned_session_t s = z_open(z_config_move(&config));
+    z_owned_session_t s;
+    z_open(&s, z_config_move(&config));
     if (!z_session_check(&s)) {
         printf("Unable to open session!\n");
         exit(-1);
diff --git a/examples/mbed/z_scout.cpp b/examples/mbed/z_scout.cpp
index c3cdf5d41..8b53bda86 100644
--- a/examples/mbed/z_scout.cpp
+++ b/examples/mbed/z_scout.cpp
@@ -99,7 +99,8 @@ int main(void) {
 
     int *context = (int *)malloc(sizeof(int));
     *context = 0;
-    z_owned_scouting_config_t config = z_scouting_config_default();
+    z_owned_scouting_config_t config;
+    z_scouting_config_default(&config);
     z_owned_closure_hello_t closure = z_closure_hello(callback, drop, context);
     printf("Scouting...\n");
     z_scout(z_scouting_config_move(&config), z_closure_hello_move(&closure));
diff --git a/examples/mbed/z_sub.cpp b/examples/mbed/z_sub.cpp
index b60f82d44..6255ad23a 100644
--- a/examples/mbed/z_sub.cpp
+++ b/examples/mbed/z_sub.cpp
@@ -45,7 +45,8 @@ int main(int argc, char **argv) {
     net.connect();
 
     // Initialize Zenoh Session and other parameters
-    z_owned_config_t config = z_config_default();
+    z_owned_config_t config;
+    z_config_default(&config);
     zp_config_insert(z_config_loan(&config), Z_CONFIG_MODE_KEY, z_string_make(MODE));
     if (strcmp(CONNECT, "") != 0) {
         zp_config_insert(z_config_loan(&config), Z_CONFIG_CONNECT_KEY, z_string_make(CONNECT));
@@ -53,7 +54,8 @@ int main(int argc, char **argv) {
 
     // Open Zenoh session
     printf("Opening Zenoh Session...");
-    z_owned_session_t s = z_open(z_config_move(&config));
+    z_owned_session_t s;
+    z_open(&s, z_config_move(&config));
     if (!z_session_check(&s)) {
         printf("Unable to open session!\n");
         exit(-1);
diff --git a/examples/unix/c11/z_get.c b/examples/unix/c11/z_get.c
index a67a203ed..196d8c1f6 100644
--- a/examples/unix/c11/z_get.c
+++ b/examples/unix/c11/z_get.c
@@ -92,7 +92,8 @@ int main(int argc, char **argv) {
     }
 
     printf("Opening session...\n");
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         return -1;
diff --git a/examples/unix/c11/z_get_channel.c b/examples/unix/c11/z_get_channel.c
index 821024253..00cba7f1c 100644
--- a/examples/unix/c11/z_get_channel.c
+++ b/examples/unix/c11/z_get_channel.c
@@ -68,7 +68,8 @@ int main(int argc, char **argv) {
     }
 
     printf("Opening session...\n");
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         return -1;
diff --git a/examples/unix/c11/z_info.c b/examples/unix/c11/z_info.c
index 269d5bd92..8833212fd 100644
--- a/examples/unix/c11/z_info.c
+++ b/examples/unix/c11/z_info.c
@@ -67,7 +67,8 @@ int main(int argc, char **argv) {
     }
 
     printf("Opening session...\n");
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         return -1;
diff --git a/examples/unix/c11/z_ping.c b/examples/unix/c11/z_ping.c
index 4d2f7003d..018b4a23f 100644
--- a/examples/unix/c11/z_ping.c
+++ b/examples/unix/c11/z_ping.c
@@ -65,7 +65,8 @@ int main(int argc, char** argv) {
     z_condvar_init(&cond);
     z_owned_config_t config;
     z_config_default(&config);
-    z_owned_session_t session = z_open(z_move(config));
+    z_owned_session_t session;
+    z_open(&session, z_move(config));
     if (!z_check(session)) {
         printf("Unable to open session!\n");
         return -1;
diff --git a/examples/unix/c11/z_pong.c b/examples/unix/c11/z_pong.c
index bf2c0f3e9..e8647214f 100644
--- a/examples/unix/c11/z_pong.c
+++ b/examples/unix/c11/z_pong.c
@@ -34,7 +34,8 @@ int main(int argc, char** argv) {
     (void)argv;
     z_owned_config_t config;
     z_config_default(&config);
-    z_owned_session_t session = z_open(z_move(config));
+    z_owned_session_t session;
+    z_open(&session, z_move(config));
     if (!z_check(session)) {
         printf("Unable to open session!\n");
         return -1;
diff --git a/examples/unix/c11/z_pub.c b/examples/unix/c11/z_pub.c
index 245f09657..6b881769b 100644
--- a/examples/unix/c11/z_pub.c
+++ b/examples/unix/c11/z_pub.c
@@ -77,7 +77,8 @@ int main(int argc, char **argv) {
     }
 
     printf("Opening session...\n");
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         return -1;
diff --git a/examples/unix/c11/z_pub_st.c b/examples/unix/c11/z_pub_st.c
index 6cd8970bc..e9b5f558b 100644
--- a/examples/unix/c11/z_pub_st.c
+++ b/examples/unix/c11/z_pub_st.c
@@ -74,7 +74,8 @@ int main(int argc, char **argv) {
     }
 
     printf("Opening session...\n");
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         return -1;
diff --git a/examples/unix/c11/z_pub_thr.c b/examples/unix/c11/z_pub_thr.c
index 1a373f679..c6fba29b3 100644
--- a/examples/unix/c11/z_pub_thr.c
+++ b/examples/unix/c11/z_pub_thr.c
@@ -39,7 +39,8 @@ int main(int argc, char **argv) {
         }
     }
     // Open session
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         exit(-1);
diff --git a/examples/unix/c11/z_pull.c b/examples/unix/c11/z_pull.c
index 1ea90d4a5..0f6cb1590 100644
--- a/examples/unix/c11/z_pull.c
+++ b/examples/unix/c11/z_pull.c
@@ -59,7 +59,8 @@ int main(int argc, char **argv) {
     }
 
     printf("Opening session...\n");
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         return -1;
diff --git a/examples/unix/c11/z_put.c b/examples/unix/c11/z_put.c
index f2eaa92ab..dfb67822f 100644
--- a/examples/unix/c11/z_put.c
+++ b/examples/unix/c11/z_put.c
@@ -72,7 +72,8 @@ int main(int argc, char **argv) {
     }
 
     printf("Opening session...\n");
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         return -1;
diff --git a/examples/unix/c11/z_queryable.c b/examples/unix/c11/z_queryable.c
index d42003b9d..1ae3244bd 100644
--- a/examples/unix/c11/z_queryable.c
+++ b/examples/unix/c11/z_queryable.c
@@ -83,7 +83,8 @@ int main(int argc, char **argv) {
     }
 
     printf("Opening session...\n");
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         return -1;
diff --git a/examples/unix/c11/z_queryable_channel.c b/examples/unix/c11/z_queryable_channel.c
index e0585b684..e12fb3fec 100644
--- a/examples/unix/c11/z_queryable_channel.c
+++ b/examples/unix/c11/z_queryable_channel.c
@@ -68,7 +68,8 @@ int main(int argc, char **argv) {
     }
 
     printf("Opening session...\n");
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         return -1;
diff --git a/examples/unix/c11/z_sub.c b/examples/unix/c11/z_sub.c
index ab93e1d6c..69a4be9f1 100644
--- a/examples/unix/c11/z_sub.c
+++ b/examples/unix/c11/z_sub.c
@@ -95,7 +95,8 @@ int main(int argc, char **argv) {
     }
 
     printf("Opening session...\n");
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         return -1;
diff --git a/examples/unix/c11/z_sub_channel.c b/examples/unix/c11/z_sub_channel.c
index 15a5330d6..87671d52c 100644
--- a/examples/unix/c11/z_sub_channel.c
+++ b/examples/unix/c11/z_sub_channel.c
@@ -51,7 +51,8 @@ int main(int argc, char **argv) {
     }
 
     printf("Opening session...\n");
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         return -1;
diff --git a/examples/unix/c11/z_sub_st.c b/examples/unix/c11/z_sub_st.c
index 7562e090d..3a2cd04b5 100644
--- a/examples/unix/c11/z_sub_st.c
+++ b/examples/unix/c11/z_sub_st.c
@@ -80,7 +80,8 @@ int main(int argc, char **argv) {
     }
 
     printf("Opening session...\n");
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         return -1;
diff --git a/examples/unix/c11/z_sub_thr.c b/examples/unix/c11/z_sub_thr.c
index 5106fde57..648af3c5f 100644
--- a/examples/unix/c11/z_sub_thr.c
+++ b/examples/unix/c11/z_sub_thr.c
@@ -80,7 +80,8 @@ int main(int argc, char **argv) {
         }
     }
     // Open session
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         exit(-1);
diff --git a/examples/windows/z_get.c b/examples/windows/z_get.c
index 14f47a79e..c156d9f89 100644
--- a/examples/windows/z_get.c
+++ b/examples/windows/z_get.c
@@ -57,7 +57,8 @@ int main(int argc, char **argv) {
     }
 
     printf("Opening session...\n");
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         return -1;
diff --git a/examples/windows/z_info.c b/examples/windows/z_info.c
index 49d8ae8fc..b4600585e 100644
--- a/examples/windows/z_info.c
+++ b/examples/windows/z_info.c
@@ -40,7 +40,8 @@ int main(int argc, char **argv) {
     }
 
     printf("Opening session...\n");
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         return -1;
diff --git a/examples/windows/z_ping.c b/examples/windows/z_ping.c
index dbb608f5c..1bdd33684 100644
--- a/examples/windows/z_ping.c
+++ b/examples/windows/z_ping.c
@@ -65,7 +65,8 @@ int main(int argc, char** argv) {
     z_condvar_init(&cond);
     z_owned_config_t config;
     z_config_default(&config);
-    z_owned_session_t session = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&session, z_move(config));
     if (!z_check(session)) {
         printf("Unable to open session!\n");
         return -1;
diff --git a/examples/windows/z_pong.c b/examples/windows/z_pong.c
index bf2c0f3e9..9d7b81b19 100644
--- a/examples/windows/z_pong.c
+++ b/examples/windows/z_pong.c
@@ -34,7 +34,8 @@ int main(int argc, char** argv) {
     (void)argv;
     z_owned_config_t config;
     z_config_default(&config);
-    z_owned_session_t session = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&session, z_move(config));
     if (!z_check(session)) {
         printf("Unable to open session!\n");
         return -1;
diff --git a/examples/windows/z_pub.c b/examples/windows/z_pub.c
index 7c20866ad..b7b10bc7e 100644
--- a/examples/windows/z_pub.c
+++ b/examples/windows/z_pub.c
@@ -35,7 +35,8 @@ int main(int argc, char **argv) {
     }
 
     printf("Opening session...\n");
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         return -1;
diff --git a/examples/windows/z_pub_st.c b/examples/windows/z_pub_st.c
index 818164609..c75c8b806 100644
--- a/examples/windows/z_pub_st.c
+++ b/examples/windows/z_pub_st.c
@@ -37,7 +37,8 @@ int main(int argc, char **argv) {
     }
 
     printf("Opening session...\n");
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         return -1;
diff --git a/examples/windows/z_pull.c b/examples/windows/z_pull.c
index 181ab4c90..4a28f6724 100644
--- a/examples/windows/z_pull.c
+++ b/examples/windows/z_pull.c
@@ -40,7 +40,8 @@ int main(int argc, char **argv) {
     }
 
     printf("Opening session...\n");
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         return -1;
diff --git a/examples/windows/z_put.c b/examples/windows/z_put.c
index 008ab820c..2f8dc5483 100644
--- a/examples/windows/z_put.c
+++ b/examples/windows/z_put.c
@@ -35,7 +35,8 @@ int main(int argc, char **argv) {
     }
 
     printf("Opening session...\n");
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         return -1;
diff --git a/examples/windows/z_queryable.c b/examples/windows/z_queryable.c
index 8b188ae39..759057927 100644
--- a/examples/windows/z_queryable.c
+++ b/examples/windows/z_queryable.c
@@ -48,7 +48,8 @@ int main(int argc, char **argv) {
     }
 
     printf("Opening session...\n");
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         return -1;
diff --git a/examples/windows/z_sub.c b/examples/windows/z_sub.c
index 1a224a25f..5d196baf9 100644
--- a/examples/windows/z_sub.c
+++ b/examples/windows/z_sub.c
@@ -42,7 +42,8 @@ int main(int argc, char **argv) {
     }
 
     printf("Opening session...\n");
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         return -1;
diff --git a/examples/windows/z_sub_st.c b/examples/windows/z_sub_st.c
index da27566fd..d499e70bb 100644
--- a/examples/windows/z_sub_st.c
+++ b/examples/windows/z_sub_st.c
@@ -47,7 +47,8 @@ int main(int argc, char **argv) {
     }
 
     printf("Opening session...\n");
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         return -1;
diff --git a/examples/zephyr/z_get.c b/examples/zephyr/z_get.c
index ef608b249..6362cb8e7 100644
--- a/examples/zephyr/z_get.c
+++ b/examples/zephyr/z_get.c
@@ -57,7 +57,8 @@ int main(int argc, char **argv) {
 
     // Open Zenoh session
     printf("Opening Zenoh Session...");
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         exit(-1);
diff --git a/examples/zephyr/z_pub.c b/examples/zephyr/z_pub.c
index dceac3cc1..61b902760 100644
--- a/examples/zephyr/z_pub.c
+++ b/examples/zephyr/z_pub.c
@@ -45,7 +45,8 @@ int main(int argc, char **argv) {
 
     // Open Zenoh session
     printf("Opening Zenoh Session...");
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         exit(-1);
diff --git a/examples/zephyr/z_pull.c b/examples/zephyr/z_pull.c
index c2c65d51d..58145744c 100644
--- a/examples/zephyr/z_pull.c
+++ b/examples/zephyr/z_pull.c
@@ -50,7 +50,8 @@ int main(int argc, char **argv) {
 
     // Open Zenoh session
     printf("Opening Zenoh Session...");
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         exit(-1);
diff --git a/examples/zephyr/z_queryable.c b/examples/zephyr/z_queryable.c
index c38abc75d..9f2f92214 100644
--- a/examples/zephyr/z_queryable.c
+++ b/examples/zephyr/z_queryable.c
@@ -53,7 +53,8 @@ int main(int argc, char **argv) {
 
     // Open Zenoh session
     printf("Opening Zenoh Session...");
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         exit(-1);
diff --git a/examples/zephyr/z_sub.c b/examples/zephyr/z_sub.c
index b80ba82d9..a1ca8d339 100644
--- a/examples/zephyr/z_sub.c
+++ b/examples/zephyr/z_sub.c
@@ -49,7 +49,8 @@ int main(int argc, char **argv) {
 
     // Open Zenoh session
     printf("Opening Zenoh Session...");
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         exit(-1);
diff --git a/include/zenoh-pico/api/primitives.h b/include/zenoh-pico/api/primitives.h
index 2b54f16fc..1844582bf 100644
--- a/include/zenoh-pico/api/primitives.h
+++ b/include/zenoh-pico/api/primitives.h
@@ -801,7 +801,7 @@ int8_t z_scout(z_owned_scouting_config_t *config, z_owned_closure_hello_t *callb
  *   A :c:type:`z_owned_session_t` with either a valid open session or a failing session.
  *   Should the session opening fail, ``z_check(val)`` ing the returned value will return ``false``.
  */
-z_owned_session_t z_open(z_owned_config_t *config);
+int8_t z_open(z_owned_session_t *zs, z_owned_config_t *config);
 
 /**
  * Closes a Zenoh session.
diff --git a/src/api/api.c b/src/api/api.c
index fa8c0f4d5..4e16215d6 100644
--- a/src/api/api.c
+++ b/src/api/api.c
@@ -561,26 +561,26 @@ int8_t z_scout(z_owned_scouting_config_t *config, z_owned_closure_hello_t *callb
     return ret;
 }
 
-z_owned_session_t z_open(z_owned_config_t *config) {
-    z_owned_session_t zs;
-    z_session_null(&zs);
+int8_t z_open(z_owned_session_t *zs, z_owned_config_t *config) {
+    z_session_null(zs);
 
     // Create rc
     _z_session_rc_t zsrc = _z_session_rc_new();
     if (zsrc.in == NULL) {
         z_config_drop(config);
-        return zs;
+        return _Z_ERR_SYSTEM_OUT_OF_MEMORY;
     }
     // Open session
-    if (_z_open(&zsrc.in->val, config->_value) != _Z_RES_OK) {
+    int8_t ret = _z_open(&zsrc.in->val, config->_value);
+    if (ret != _Z_RES_OK) {
         _z_session_rc_drop(&zsrc);
         z_config_drop(config);
-        return zs;
+        return ret;
     }
     // Store rc in session
-    zs._rc = zsrc;
+    zs->_rc = zsrc;
     z_config_drop(config);
-    return zs;
+    return _Z_RES_OK;
 }
 
 int8_t z_close(z_owned_session_t *zs) {
diff --git a/tests/z_api_alignment_test.c b/tests/z_api_alignment_test.c
index 0a6b59f77..eda75c0d2 100644
--- a/tests/z_api_alignment_test.c
+++ b/tests/z_api_alignment_test.c
@@ -221,7 +221,8 @@ int main(int argc, char **argv) {
     printf("Ok\n");
     z_sleep_s(SLEEP);
 
-    z_owned_session_t s1 = z_open(z_move(_ret_config));
+    z_owned_session_t s1;
+    z_open(&s1, z_move(_ret_config));
     assert(z_check(s1));
     z_id_t _ret_zid = z_info_zid(z_loan(s1));
     printf("Session 1 with PID: 0x");
@@ -260,7 +261,8 @@ int main(int argc, char **argv) {
     assert_eq(strncmp(_ret_cstr, argv[1], strlen(_ret_cstr)), 0);
 #endif
 
-    z_owned_session_t s2 = z_open(z_move(_ret_config));
+    z_owned_session_t s2;
+    z_open(&s2, z_move(_ret_config));
     assert(z_check(s2));
     _ret_zid = z_info_zid(z_loan(s2));
     printf("Session 2 with PID: 0x");
diff --git a/tests/z_client_test.c b/tests/z_client_test.c
index 61f8b5d6f..02bc0f5f5 100644
--- a/tests/z_client_test.c
+++ b/tests/z_client_test.c
@@ -121,7 +121,8 @@ int main(int argc, char **argv) {
 
     for (unsigned int i = 0; i < SET; i++) idx[i] = i;
 
-    z_owned_session_t s1 = z_open(z_move(config));
+    z_owned_session_t s1;
+    z_open(&s1, z_move(config));
     assert(z_check(s1));
     z_string_t zid1 = format_id(&(_Z_RC_IN_VAL(z_loan(s1))._local_zid));
     printf("Session 1 with PID: %s\n", zid1.val);
@@ -136,7 +137,8 @@ int main(int argc, char **argv) {
     z_config_default(&config);
     zp_config_insert(z_loan(config), Z_CONFIG_CONNECT_KEY, z_string_make(argv[1]));
 
-    z_owned_session_t s2 = z_open(z_move(config));
+    z_owned_session_t s2;
+    z_open(&s2, z_move(config));
     assert(z_check(s2));
     z_string_t zid2 = format_id(&(_Z_RC_IN_VAL(z_loan(s2))._local_zid));
     printf("Session 2 with PID: %s\n", zid2.val);
diff --git a/tests/z_peer_multicast_test.c b/tests/z_peer_multicast_test.c
index 6b7902a79..88f977b81 100644
--- a/tests/z_peer_multicast_test.c
+++ b/tests/z_peer_multicast_test.c
@@ -72,7 +72,8 @@ int main(int argc, char **argv) {
 
     for (unsigned int i = 0; i < SET; i++) idx[i] = i;
 
-    z_owned_session_t s1 = z_open(z_move(config));
+    z_owned_session_t s1;
+    z_open(&s1, z_move(config));
     assert(z_check(s1));
     _z_bytes_t id_as_bytes =
         _z_bytes_wrap(_Z_RC_IN_VAL(z_loan(s1))._local_zid.id, _z_id_len(_Z_RC_IN_VAL(z_loan(s1))._local_zid));
@@ -90,7 +91,8 @@ int main(int argc, char **argv) {
     zp_config_insert(z_loan(config), Z_CONFIG_MODE_KEY, z_string_make("peer"));
     zp_config_insert(z_loan(config), Z_CONFIG_CONNECT_KEY, z_string_make(argv[1]));
 
-    z_owned_session_t s2 = z_open(z_move(config));
+    z_owned_session_t s2;
+    z_open(&s2, z_move(config));
     assert(z_check(s2));
     id_as_bytes = _z_bytes_wrap(_Z_RC_IN_VAL(z_loan(s2))._local_zid.id, _z_id_len(_Z_RC_IN_VAL(z_loan(s2))._local_zid));
     z_string_t zid2 = _z_string_from_bytes(&id_as_bytes);
diff --git a/tests/z_perf_rx.c b/tests/z_perf_rx.c
index 44263e32b..e2d9c1f40 100644
--- a/tests/z_perf_rx.c
+++ b/tests/z_perf_rx.c
@@ -86,7 +86,8 @@ int main(int argc, char **argv) {
         zp_config_insert(z_loan(config), Z_CONFIG_CONNECT_KEY, z_string_make(clocator));
     }
     // Open session
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         exit(-1);
diff --git a/tests/z_perf_tx.c b/tests/z_perf_tx.c
index 042fe7a1a..b0fcb4432 100644
--- a/tests/z_perf_tx.c
+++ b/tests/z_perf_tx.c
@@ -64,7 +64,8 @@ int main(int argc, char **argv) {
         zp_config_insert(z_loan(config), Z_CONFIG_CONNECT_KEY, z_string_make(clocator));
     }
     // Open session
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         exit(-1);
diff --git a/tests/z_session_test.c b/tests/z_session_test.c
index 624696a86..57f383dbc 100644
--- a/tests/z_session_test.c
+++ b/tests/z_session_test.c
@@ -27,7 +27,8 @@ int main(void) {
     zp_config_insert(z_loan(config), Z_CONFIG_MODE_KEY, z_string_make("client"));
 
     printf("Opening session...\n");
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         return -1;
diff --git a/tests/z_test_fragment_rx.c b/tests/z_test_fragment_rx.c
index 1df4b7528..c2c0aa824 100644
--- a/tests/z_test_fragment_rx.c
+++ b/tests/z_test_fragment_rx.c
@@ -61,7 +61,8 @@ int main(int argc, char **argv) {
         zp_config_insert(z_loan(config), Z_CONFIG_CONNECT_KEY, z_string_make(clocator));
     }
     // Open session
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         return -1;
diff --git a/tests/z_test_fragment_tx.c b/tests/z_test_fragment_tx.c
index 6e9bb3a06..402c62f70 100644
--- a/tests/z_test_fragment_tx.c
+++ b/tests/z_test_fragment_tx.c
@@ -58,7 +58,8 @@ int main(int argc, char **argv) {
         zp_config_insert(z_loan(config), Z_CONFIG_CONNECT_KEY, z_string_make(clocator));
     }
     // Open session
-    z_owned_session_t s = z_open(z_move(config));
+    z_owned_session_t s;
+    z_open(&s, z_move(config));
     if (!z_check(s)) {
         printf("Unable to open session!\n");
         return -1;