diff --git a/README.md b/README.md
index 0623253..a394758 100644
--- a/README.md
+++ b/README.md
@@ -84,7 +84,7 @@ You can easily customize your own configurations from the set of features that S
 
 ## Version 
 ```
-4.6.4
+4.6.4.1
 ```
 
 ## RML-Test Cases
diff --git a/VERSION b/VERSION
index 101d404..7e4bae4 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-4.6.4
\ No newline at end of file
+4.6.4.1
\ No newline at end of file
diff --git a/rdfizer/rdfizer/__init__.py b/rdfizer/rdfizer/__init__.py
index 68d8b42..b827073 100755
--- a/rdfizer/rdfizer/__init__.py
+++ b/rdfizer/rdfizer/__init__.py
@@ -1460,13 +1460,22 @@ def semantify_json(triples_map, triples_map_list, delimiter, output_file_descrip
 			new_iterator += tp + "."
 			if "$" != tp and "" != tp:
 				if "[*][*]" in tp:
-					row = row[tp.split("[*][*]")[0]]
+					if tp.split("[*][*]")[0] in row:
+						row = row[tp.split("[*][*]")[0]]
+					else:
+						row = []
 				elif "[*]" in tp:
-					row = row[tp.split("[*]")[0]]
+					if tp.split("[*]")[0] in row:
+						row = row[tp.split("[*]")[0]]
+					else:
+						row = []
 				elif "*" == tp:
 					pass
 				else:
-					row = row[tp]
+					if tp in row:
+						row = row[tp]
+					else:
+						row = []
 			if new_iterator != ".":
 				if "*" == new_iterator[-2]:
 					for sub_row in row:
diff --git a/rdfizer/rdfizer/semantify.py b/rdfizer/rdfizer/semantify.py
index 68d8b42..b827073 100755
--- a/rdfizer/rdfizer/semantify.py
+++ b/rdfizer/rdfizer/semantify.py
@@ -1460,13 +1460,22 @@ def semantify_json(triples_map, triples_map_list, delimiter, output_file_descrip
 			new_iterator += tp + "."
 			if "$" != tp and "" != tp:
 				if "[*][*]" in tp:
-					row = row[tp.split("[*][*]")[0]]
+					if tp.split("[*][*]")[0] in row:
+						row = row[tp.split("[*][*]")[0]]
+					else:
+						row = []
 				elif "[*]" in tp:
-					row = row[tp.split("[*]")[0]]
+					if tp.split("[*]")[0] in row:
+						row = row[tp.split("[*]")[0]]
+					else:
+						row = []
 				elif "*" == tp:
 					pass
 				else:
-					row = row[tp]
+					if tp in row:
+						row = row[tp]
+					else:
+						row = []
 			if new_iterator != ".":
 				if "*" == new_iterator[-2]:
 					for sub_row in row: