SAP dialog screen / dynpro Exit Command
The dynpro exit command enables a user to implement dialog screen functionality which gets processed even if the user has entered data into a field which is invalid. An example use for this would be if you had a dialog screen containing fields which are mandatory but you still want to allow the user to exit the application without having to fill these otherwise mandatory fields in. You would therefore create a function code of type exit-command within the PF-STATUS and when this function is selected by the user the ABAP code within the PAI module of the screen is executed regardless of any validity checks associated with the dialog screen.
Once the 'exit command' function code has been created you will then need to add it to the relevant PAI module call within the flow logic of the SAP dynpro.
... *dynpro PAI flow logic PROCESS AFTER INPUT. *EXIT-COMMAND means module will be called first bypassing any feild validation MODULE USER_COMMAND_0100 AT EXIT-COMMAND.