diff --git a/workflow/engine/classes/model/AdditionalTables.php b/workflow/engine/classes/model/AdditionalTables.php
index b6549e701..ccc949199 100755
--- a/workflow/engine/classes/model/AdditionalTables.php
+++ b/workflow/engine/classes/model/AdditionalTables.php
@@ -40,10 +40,12 @@ function validateType ($value, $type)
                 $value1 = str_replace(".", "", $value1);
                 $value = $value1.".".$value2;
             } else {
-                $value2 = substr($value, $posPoint+1);
-                $value1 = substr($value, 0, $posPoint);
-                $value1 = str_replace(",", "", $value1);
-                $value = $value1.".".$value2;
+                if($posPoint) {
+                    $value2 = substr($value, $posPoint+1);
+                    $value1 = substr($value, 0, $posPoint);
+                    $value1 = str_replace(",", "", $value1);
+                    $value = $value1.".".$value2;
+                }
             }
             break;
         default: