Normally, if a validation clause, such as FULL or REQUIRED, is specified in an ACCEPT statement, that clause must be satisfied before you can leave the field. For example, when the statement:
accept data-item with required
is executed, you are not allowed to terminate the ACCEPT operation unless something has been entered into the field.
However, if an enabled user function key is pressed during an ACCEPT operation, it is regarded as an exception and terminates the ACCEPT operation even if the validation clause has not been satisfied. If you do not want function keys to terminate the ACCEPT operation without satisfying validation clauses, you can set ACCEPT/DISPLAY option 9 using Adiscf.