Error message in user exit
I want to show an error message in ZXCOFU05 user exit.
When I write :
message 'Fill value' type 'W'.
It is ok for first time. When my clause executed. It is display Fill value message and after that return prev. screen.
But when I press again save button it couldn't handle message.
Shortly : How can I display an error message in user exit and after message return prev.screen?