I never used the enhancement point/implementation concept till now. I created an enhancement implementation for SAPMM06B (Pur. Req) in the same Package as the rest of the application is (ME). Now, I need to perform some valiations and display an error message in case the validations fail. Do I have to create a new include/subroutine where I can stick my code? as I am getting the "Statement not accessible" error if I try to add some executable code right there (between Enhancement & Endenhancement).
Is there a step-by-step procedure to follow while using explicit enhancement points?