Runtime Error : ASSERTION_FAILED while clicking on shop button to create SC

Hi Experts.

We are using SRM 7.0

When i am clicking on shop button to create shopping cart getting

RUNTIME ERROR : ASSERTION_FAILED

Termination occurred in the ABAP program "/SAPSRM/CL_CH_WD_GAF_FACTORY==CP" -

in "SET_GAF_PROVIDER".

The main program was "SAPMHTTP ".

In the source code you have the termination point in line 29.

Please suggest what should I do ?

Thanks and Regards

Bumhwan oh