diff --git a/src/main/java/org/gcube/portlets/user/statisticalalgorithmsimporter/client/tools/input/InputOutputVariablesPanel.java b/src/main/java/org/gcube/portlets/user/statisticalalgorithmsimporter/client/tools/input/InputOutputVariablesPanel.java
index b0d13ed..93b758e 100644
--- a/src/main/java/org/gcube/portlets/user/statisticalalgorithmsimporter/client/tools/input/InputOutputVariablesPanel.java
+++ b/src/main/java/org/gcube/portlets/user/statisticalalgorithmsimporter/client/tools/input/InputOutputVariablesPanel.java
@@ -269,8 +269,7 @@ public class InputOutputVariablesPanel extends ContentPanel {
 		defaultValueColumnEditing.setAllowBlank(false);
 		defaultValueColumnEditing.addValidator(new RegExValidator("^[^\"\\\\]*(?:\\\\.[^\"\\\\]*)*$",
 				"Attention character \" is not allowed"));
-		defaultValueColumnEditing.addValidator(new RegExValidator("^[^\\s]*$",
-				"Attention insert a valid default value"));
+		
 		
 		
 		gridInputOutputVariablesEditing = new GridRowEditing<InputOutputVariables>(