Hi helpme,
I would check the step where the exit is.
Can you change your preconditions so only 1 case is valid.
ie: BKPF-BLART = "XX" AND BKPF-AWTYP = "BKPF" ?
If the condition is true, the exit will be executed; otherwise it will not be executed.
Activate trace on the validation an enter your document.
Click on the Details button and will take you to the validation.
Kind Regards