I have a program which calls simple pop-up screen with 4 fields. After populating the fields and pressing 'ENTER' nothing happened, I'm not able to continue or to close the screen. I've debugged the program and found that in PAI module where I am making some checks the field OK_CODE is empty. It doesn't rerutn any values. I've checked SY-UCOMM - the same and what is strange is tha program was working.
Please advise !