diff --git a/workflow/engine/classes/class.pmFunctions.php b/workflow/engine/classes/class.pmFunctions.php
index 1c769798a..b7d3c486d 100755
--- a/workflow/engine/classes/class.pmFunctions.php
+++ b/workflow/engine/classes/class.pmFunctions.php
@@ -2843,8 +2843,9 @@ function PMFAddAttachmentToArray($arrayData, $index, $value, $suffix = " Copy({i
  *
  * It delete the mask a field.
  *
- * @name PMFAddAttachmentToArray
- *
+ * @name PMFRemoveMask
+ * @label PMF Remove Mask
+ * 
  * @param string | $field | Value the field
  * @param string | $separator | Separator of thousands (, or .)
  * @param string | $currency | symbol of currency
@@ -2852,7 +2853,7 @@ function PMFAddAttachmentToArray($arrayData, $index, $value, $suffix = " Copy({i
  *
  */
 
-function PMRemoveMask ($field, $separator = '.', $currency = '')
+function PMFRemoveMask ($field, $separator = '.', $currency = '')
 {
     $sep = array();
     if ( trim($currency) != '') {
diff --git a/workflow/engine/classes/class.wsBase.php b/workflow/engine/classes/class.wsBase.php
index 9a965b85e..7f00851e3 100755
--- a/workflow/engine/classes/class.wsBase.php
+++ b/workflow/engine/classes/class.wsBase.php
@@ -3079,7 +3079,6 @@ class wsBase
 
                 return $result;
             }
-
             if (empty( $userUid )) {
                 $result = new wsResponse( 100, G::LoadTranslation( "ID_REQUIRED_FIELD" ) . " userUid" );
 
@@ -3087,8 +3086,7 @@ class wsBase
 
                 return $result;
             }
-
-            if (! empty( $unpauseDate )) {
+            if( strlen($unpauseDate) >=10 ){
                 if (! preg_match( "/^\d{4}-\d{2}-\d{2}| \d{2}:\d{2}:\d{2}$/", $unpauseDate )) {
                     $result = new wsResponse( 100, G::LoadTranslation( "ID_INVALID_DATA" ) . " $unpauseDate" );
 
@@ -3096,8 +3094,9 @@ class wsBase
 
                     return $result;
                 }
+            }  else {
+            	$unpauseDate = null;
             }
-
             $case = new Cases();
             $case->pauseCase( $caseUid, $delIndex, $userUid, $unpauseDate );
 
@@ -3108,7 +3107,6 @@ class wsBase
             );
 
             $g->sessionVarRestore();
-
             return $result;
         } catch (Exception $e) {
             $result = new wsResponse(100, $e->getMessage());