diff --git a/api/include/awa/error.h b/api/include/awa/error.h
index dbd1fd9..492df70 100644
--- a/api/include/awa/error.h
+++ b/api/include/awa/error.h
@@ -86,6 +86,7 @@ typedef enum
     // 31
     AwaError_StaticClientInvalid,        /**< Indicates an operation was attempted in the context of an invalid Static Client */
     AwaError_StaticClientNotConfigured,  /**< Indicates a Static Client was initialised without being configured */
+    AwaError_StaticClientNotInitialized, /**< Indicates a Static Client was not initialized */
     AwaError_LogLevelInvalid,            /**< Indicates an attempt to set an unknown log level  */
 
 
diff --git a/api/src/error.c b/api/src/error.c
index d89f229..31cdb00 100644
--- a/api/src/error.c
+++ b/api/src/error.c
@@ -77,6 +77,7 @@ static const char * ErrorStrings[] =
     // 31
     "AwaError_StaticClientInvalid",
     "AwaError_StaticClientNotConfigured",
+    "AwaError_StaticClientNotInitialized",
     "AwaError_LogLevelInvalid",
 };
 
diff --git a/api/tests-static/test_static_api_handlers.cc b/api/tests-static/test_static_api_handlers.cc
index e785d98..616d6f1 100644
--- a/api/tests-static/test_static_api_handlers.cc
+++ b/api/tests-static/test_static_api_handlers.cc
@@ -34,8 +34,20 @@ TEST_F(TestStaticClientHandler, AwaStaticClient_SetResourceOperationHandler_Inva
 {
     auto client = AwaStaticClient_New();
     ASSERT_TRUE(client != NULL);
-    EXPECT_EQ(AwaError_Success, AwaStaticClient_DefineObject(client, 9999, "TestObject", 0, 1));
-    EXPECT_EQ(AwaError_Success, AwaStaticClient_DefineResource(client, 9999, 1, "TestResource", AwaResourceType_Integer, 1, 1, AwaResourceOperations_ReadWrite));
+
+    EXPECT_EQ(AwaError_DefinitionInvalid,          AwaStaticClient_SetResourceOperationHandler(client, 9999, 1, handler));
+    EXPECT_EQ(AwaError_StaticClientNotInitialized, AwaStaticClient_DefineObject(client, 9999, "TestObject", 0, 1));
+    EXPECT_EQ(AwaError_DefinitionInvalid,          AwaStaticClient_SetResourceOperationHandler(client, 9999, 1, handler));
+    EXPECT_EQ(AwaError_StaticClientNotInitialized, AwaStaticClient_DefineResource(client, 9999, 1, "TestResource", AwaResourceType_Integer, 1, 1, AwaResourceOperations_ReadWrite));
+
+    EXPECT_EQ(AwaError_Success, AwaStaticClient_SetBootstrapServerURI(client, "coap://127.0.0.1:15683/"));
+    EXPECT_EQ(AwaError_Success, AwaStaticClient_SetEndPointName(client, "imagination1"));
+    EXPECT_EQ(AwaError_Success, AwaStaticClient_SetCoAPListenAddressPort(client, "0.0.0.0", 5683));
+
+    EXPECT_EQ(AwaError_Success, AwaStaticClient_Init(client));
+
+    EXPECT_EQ(AwaError_Success , AwaStaticClient_DefineObject(client, 9999, "TestObject", 0, 1));
+    EXPECT_EQ(AwaError_Success,  AwaStaticClient_DefineResource(client, 9999, 1, "TestResource", AwaResourceType_Integer, 1, 1, AwaResourceOperations_ReadWrite));
 
     EXPECT_EQ(AwaError_StaticClientInvalid, AwaStaticClient_SetResourceOperationHandler(NULL,   9999, 1, handler));
     EXPECT_EQ(AwaError_DefinitionInvalid,   AwaStaticClient_SetResourceOperationHandler(client, 9999, 1, NULL));
diff --git a/core/src/client/lwm2m_static.c b/core/src/client/lwm2m_static.c
index 827d7df..da79992 100644
--- a/core/src/client/lwm2m_static.c
+++ b/core/src/client/lwm2m_static.c
@@ -547,30 +547,37 @@ AwaError AwaStaticClient_DefineObject(AwaStaticClient * client, AwaObjectID obje
 
     if (client != NULL)
     {
-        if ((objectName != NULL) && (minimumInstances <= maximumInstances))
+        if (client->Initialised)
         {
-            ObjectDefinition * definition = Definition_NewObjectTypeWithHandler(objectName, objectID, minimumInstances, maximumInstances, (LWM2MHandler)DefaultHandler);
-
-            if (definition != NULL)
+            if ((objectName != NULL) && (minimumInstances <= maximumInstances))
             {
-                if (Definition_AddObjectType(Lwm2mCore_GetDefinitions(client->Context), definition) == 0)
+                ObjectDefinition * definition = Definition_NewObjectTypeWithHandler(objectName, objectID, minimumInstances, maximumInstances, (LWM2MHandler)DefaultHandler);
+
+                if (definition != NULL)
                 {
-                    Lwm2mCore_ObjectCreated(client->Context, objectID);
-                    result = AwaError_Success;
+                    if (Definition_AddObjectType(Lwm2mCore_GetDefinitions(client->Context), definition) == 0)
+                    {
+                        Lwm2mCore_ObjectCreated(client->Context, objectID);
+                        result = AwaError_Success;
+                    }
+                    else
+                    {
+                        result = AwaError_Internal;
+                    }
                 }
                 else
                 {
-                    result = AwaError_Internal;
+                    result = AwaError_OutOfMemory;
                 }
             }
             else
             {
-                result = AwaError_OutOfMemory;
+                result = AwaError_DefinitionInvalid;
             }
         }
         else
         {
-            result = AwaError_DefinitionInvalid;
+            result = AwaError_StaticClientNotInitialized;
         }
     }
     else
@@ -749,37 +756,44 @@ static AwaError DefineResource(AwaStaticClient * client, const char * resourceNa
 
     if (client != NULL)
     {
-        if ((resourceName != NULL) && (minimumInstances <= maximumInstances))
+        if (client->Initialised)
         {
-            ObjectDefinition * objFormat = Definition_LookupObjectDefinition(Lwm2mCore_GetDefinitions(client->Context), objectID);
-            if (objFormat != NULL)
+            if ((resourceName != NULL) && (minimumInstances <= maximumInstances))
             {
-                ResourceDefinition * resourceDefinition = Definition_NewResourceTypeWithHandler(objFormat, resourceName, resourceID, resourceType, minimumInstances, maximumInstances, operations, (LWM2MHandler)handler);
-                if (resourceDefinition != NULL)
+                ObjectDefinition * objFormat = Definition_LookupObjectDefinition(Lwm2mCore_GetDefinitions(client->Context), objectID);
+                if (objFormat != NULL)
                 {
-                    resourceDefinition->Handler = (LWM2MHandler)handler;
-                    resourceDefinition->DataPointers = dataPointers;
-                    resourceDefinition->IsPointerArray = isPointerArray;
-                    resourceDefinition->DataElementSize = dataElementSize;
-                    resourceDefinition->DataStepSize = dataStepSize;
-                    result = AwaError_Success;
+                    ResourceDefinition * resourceDefinition = Definition_NewResourceTypeWithHandler(objFormat, resourceName, resourceID, resourceType, minimumInstances, maximumInstances, operations, (LWM2MHandler)handler);
+                    if (resourceDefinition != NULL)
+                    {
+                        resourceDefinition->Handler = (LWM2MHandler)handler;
+                        resourceDefinition->DataPointers = dataPointers;
+                        resourceDefinition->IsPointerArray = isPointerArray;
+                        resourceDefinition->DataElementSize = dataElementSize;
+                        resourceDefinition->DataStepSize = dataStepSize;
+                        result = AwaError_Success;
+                    }
+                    else
+                    {
+                        Lwm2m_Warning("resourceDefinition is NULL\n");
+                        result = AwaError_DefinitionInvalid;
+                    }
                 }
                 else
                 {
-                    Lwm2m_Warning("resourceDefinition is NULL\n");
+                    Lwm2m_Warning("objFormat is NULL\n");
                     result = AwaError_DefinitionInvalid;
                 }
             }
             else
             {
-                Lwm2m_Warning("objFormat is NULL\n");
+                Lwm2m_Warning("One or more Define parameters are invalid\n");
                 result = AwaError_DefinitionInvalid;
             }
         }
         else
         {
-            Lwm2m_Warning("One or more Define parameters are invalid\n");
-            result = AwaError_DefinitionInvalid;
+            result = AwaError_StaticClientNotInitialized;
         }
     }
     else