Unable SAP Work Directory in Webdynpro ABAP

Hi,

I got a requirement to display SAP Work Directory path in Webdynpro ABAP application.

So I am using FM - IW_C_GET_SAPWORKDIR to retrieve the path. I can able to execute in SAP GUI but when I try to execute the FM in Webdynro ABAP, its going to the runtime error.

Suggest me to proceed further. Thanks in Advance!

Thanks & Regards,

Jaipal.