diff --git a/pandora_console/godmode/agentes/module_manager_editor_common.php b/pandora_console/godmode/agentes/module_manager_editor_common.php
index a764eff924..040ad8a307 100644
--- a/pandora_console/godmode/agentes/module_manager_editor_common.php
+++ b/pandora_console/godmode/agentes/module_manager_editor_common.php
@@ -1175,9 +1175,10 @@ function delete_relation (num_row, id_relation) {
 
 function validate_post_process() {
 	var post_process = $("#text-post_process").val();
-	var new_post_process = post_process.replace(',', '.');
-	
-	$("#text-post_process").val(new_post_process);
+	if(post_process !== undefined){
+		var new_post_process = post_process.replace(',', '.');	
+		$("#text-post_process").val(new_post_process);
+	}
 }
 
 //function paint graph