How To Fix MSR_INSP_MESSAGES128 - Algebraic sign doesn't match the source qty & and target qty & BUOM

SAP Error Message - Details

• Message type: E = Error

• Message class: MSR_INSP_MESSAGES - Messages for Inspections

• Message number: 128

• Message text: Algebraic sign doesn't match the source qty & and target qty & BUOM

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message MSR_INSP_MESSAGES128 - Algebraic sign doesn't match the source qty & and target qty & BUOM ?

  The SAP error message MSR_INSP_MESSAGES128 indicates that there is a mismatch in the algebraic signs of the source quantity and the target quantity during a material inspection process. This typically occurs in the context of quality management (QM) or inventory management when dealing with stock movements, inspections, or transfers.
  Cause:
  
  Quantity Mismatch: The source quantity (the quantity being moved or inspected) and the target quantity (the quantity expected in the destination) have different signs. For example, if the source quantity is positive (indicating an addition) and the target quantity is negative (indicating a deduction), this will trigger the error.
  Unit of Measure (UoM) Issues: There may be discrepancies in the units of measure being used for the source and target quantities. If the system expects a certain UoM and receives a different one, it can lead to this error.
  Configuration Issues: There may be configuration settings in the SAP system that are not aligned with the business processes, leading to incorrect handling of quantities.
  
  Solution:
  
  Check Quantity Signs: Review the source and target quantities in the transaction that triggered the error. Ensure that both quantities have the correct signs based on the intended operation (addition or subtraction).
  Verify UoM: Ensure that the units of measure for both the source and target quantities are consistent and correctly defined in the system. If necessary, convert the quantities to a common unit of measure.
  Review Configuration: Check the configuration settings in the SAP system related to inventory management and quality management. Ensure that they align with your business processes and that there are no discrepancies.
  Transaction Review: If the error occurs during a specific transaction, review the transaction details for any inconsistencies or errors in data entry.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on handling this error in the context of your version of SAP.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its knowledge base with solutions for common problems.
  User Forums: Engage with SAP user communities or forums where similar issues may have been discussed. Other users may have encountered the same error and can provide insights or solutions.
  SAP Support: If the issue persists and cannot be resolved through the above steps, consider reaching out to SAP support for assistance. They can provide more detailed troubleshooting based on your specific system configuration and usage.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.