Message type: E = Error
Message class: B1 - ALE group messages
Message number: 517
Message text: Predecessor & exists
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B1517
- Predecessor & exists ?The SAP error message B1517 ("Predecessor & exists") typically occurs in the context of project management or production planning when you are trying to create or modify a task or activity that has a predecessor relationship defined, but the predecessor task is not valid or does not exist in the system.
Cause: Non-existent Predecessor: The predecessor task or activity you are trying to reference does not exist in the system. Incorrect Task ID: There may be a typo or incorrect ID used for the predecessor task. Deleted or Inactive Task: The predecessor task may have been deleted or marked as inactive. Project Structure Issues: There may be issues with the project structure or hierarchy that prevent the predecessor from being recognized.
Solution: Verify Predecessor ID: Check the predecessor task ID you are trying to use. Ensure that it is correct and exists in the system. Check Task Status: Ensure that the predecessor task is active and has not
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