This problem is caused by a program error in the SAP Front end.
Install the latest front-end patch.
The latest Support Packages are available from the "SAP Service Marketplace" (http://service.sap.com/swcenter-main).
Use the following level patch or higher:
SAPGUI 620: Patch level 29
SAPGUI 46D: Patch level 600
For more information about downloading and installing, refer to note 96885.
You can read more about SAP ABAP