I have activated standard SAP workflow for business object BUS2007 for Purchase Order Change due to Maintenance Order Change in Plant Maintenance. All workflow activation steps as per SAP are complete and work item is created in user inbox when event is triggered. However, when we click the work item in inbox, we get this error "Internal error while calling method cl_gui_cfw=>flush". I need help to resolve this issue. Also, the Work order number should be populated in the subject line for the work item and that is not happening. Please help. Thanks.