I'm developing an IDoc inbound interface for purchase order create using PORDCR1. For the error handling functionality, I need to send an external email describing all of the validation error happened in user-exit EXIT_SAPFKCIM_002. Please kindly tell me how to cater the functionality. I won't use workflow because the error handling can't describe all the error, it just displaying the first error encountered. I also don't want to create any custom object since message type PORDCR1 is available. I think creating a custom FM is a possible way, but if there is another way, please tell me how.