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Validation for T-code FB50

Hi, I need to validate the user input for T-Code FB50 at the line item.

I've implement the validation rule and created a user exit. However, the validation rule cannot validate the data line by line at the item table because the value BSEG and COBL that pass in are wierd.

How can I validate the input line by line? What should I pass into the user exit (the screen table name?)?

Former Member
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