T-code
SA38
Program
GRFNMW_MANUAL_INSTANCE_CANCEL
Select Option
Directly Abort Instance
To Get MSMP Instance id
T-code
SE16
Table Name
GRFNMWRTINST
Field
EXTERNAL_KEY_DIS = Request Number and execute (F8)
Copy MSMP Instance ID and provide it to cancel program and execute to cancel your GRC request instance