How To Fix COWIPB328 - Assignment can no longer be changed (OB exists for item)

COWIPB328 - Overview

• Message type: E = Error

• Message class: COWIPB - Messages for WIP Batch

• Message number: 328

• Message text: Assignment can no longer be changed (OB exists for item)

Self-Explanatory Message

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COWIPB328 - Details

• The SAP error message COWIPB328, which states "Assignment can no longer be changed (OB exists for item)," typically occurs in the context of production orders or work orders when there is an attempt to change the assignment of a component or operation that has already been processed or has an open balance (OB) associated with it.
  
  Cause:
  
  Open Balance Exists: The primary reason for this error is that there is an open balance for the item in question. This means that the item has already been partially or fully processed, and any changes to its assignment are restricted to maintain data integrity.
  Status of the Order: The production order or work order may be in a status that does not allow changes, such as "TECO" (Technically Completed) or "CLOSE".
  Dependencies: There may be dependencies or links to other documents (like purchase orders or stock transfers) that prevent changes to the assignment.
  
  
  Solution:
  
  Check Open Balances: Review