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User Data not maintained. Please correct.

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When I was trying to run custom tcode in test client this error is popping up. But I am able to run in ABAP User.

Can someone please explain this?

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Answers (1)

Active Contributor
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Because the Error Message Number is on the user namespace (ZABAP166) you need to check with the developer who created the code (or debug it yourself) to find were the error come from.