Avoiding field data validation in UNBUFFERED mode

When the UNBUFFERED mode is used by the interactive instruction, the current field value is validated before ON ACTION is invoked. If you want to disabled this validation (typically, for a user-defined cancel or quit action), you can set the VALIDATE action default attribute to zero. This is especially needed in DIALOG instructions; in singular dialogs like INPUT, predefined actions like cancel do not validate the current field value when UNBUFFERED mode is used.

ACTION DEFAULTS
   ...
   ACTION zoom ( ... VALIDATE = NO ... )
   ...
END