diff --git a/src/main/java/org/gcube/portlets/user/statisticalalgorithmsimporter/server/generator/AlgorithmGenerator.java b/src/main/java/org/gcube/portlets/user/statisticalalgorithmsimporter/server/generator/AlgorithmGenerator.java
index 0916659..ba5ad5e 100644
--- a/src/main/java/org/gcube/portlets/user/statisticalalgorithmsimporter/server/generator/AlgorithmGenerator.java
+++ b/src/main/java/org/gcube/portlets/user/statisticalalgorithmsimporter/server/generator/AlgorithmGenerator.java
@@ -256,10 +256,15 @@ public class AlgorithmGenerator {
 
 			}
 		}
-
+		
+		code.add("");
+		
+		for (GlobalVariables globalVariable : project.getInputData().getListGlobalVariables()) {
+			code.add("		inputvariables.add(\"" + globalVariable.getName() + "\");");
+		}
+		
 		for (InputOutputVariables selVariable : project.getInputData().getListInputOutputVariables()) {
-			if (selVariable != null && selVariable.getDataType() != null
-					&& selVariable.getDataType().compareTo(DataType.SYSTEM) != 0) {
+			if (selVariable != null && selVariable.getDataType() != null) {
 				switch (selVariable.getIoType()) {
 				case INPUT:
 					code.add("		inputvariables.add(\"" + selVariable.getName() + "\");");