Error message from user exit - current screen becomes grayed(non-editable)
I am working on a Sales Order (VA01/VA02) user exit(USEREXIT_SAVE_DOCUMENT_PREPARE) in MV45AFZZ program. I am validating certain values entered by user in this exit. Based on a condition, I issue a error message e.g. "message e001(ZV) with .....". I expect the processing to interrupt and the system control returns to the current screen. When there is an error, error message shows up on the status bar, but the current screen is completely grayed out(non-editable), not able to modify the incorrect entries. I keep hitting ENTER but no change to the grayed screen. Is there anything wrong in the way I issue error message?
I am on ECC6.