When I use the MR11_OLD transaction in the GR/IR matching to book the differences the Account Maintenance document was created and I now want to Reverse the booking or document 4800011111 and it is 3 Purchase orders involved and all posting I want to reverse when the booking is incorrect on all items. I have tried to use MR!! SHOW but message that the FI document can´t be find and also FB08 so please help me to reverse a AccM document with document type KP.