Exit screen when obligatory fields are not filled

Define function button in GUI status with functional type ‘E’ – Exit command.

In Process after input call module at exit command as follows:

PROCESS AFTER INPUT.
MODULE cancel AT EXIT-COMMAND.

And implement module:

MODULE cancel INPUT.
* Just leave the screen without checking any obligatory fields
  LEAVE TO SCREEN 0.

ENDMODULE. ” CANCEL_POPUP INPUT