How To Fix WRF_AT153 - System error while updating distribution data (UoM conversion)

SAP Error Message - Details

• Message type: E = Error

• Message class: WRF_AT - Messages for Allocation Table RTFASH

• Message number: 153

• Message text: System error while updating distribution data (UoM conversion)

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.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message WRF_AT153 - System error while updating distribution data (UoM conversion) ?

  SAP Error Message:
  
  WRF_AT153 – System error while updating distribution data (UoM conversion)
  
  Cause
  This error typically occurs during the update of distribution data in SAP when there is an issue related to Unit of Measure (UoM) conversion. The system tries to convert quantities between different units of measure but encounters a problem such as:
  
  Missing or incorrect UoM conversion factors in the system.
  Inconsistent or invalid UoM data in the material master or related tables.
  Data inconsistencies or corruption in distribution data or related tables.
  Custom code or user-exits that incorrectly handle UoM conversions.
  Incorrect configuration in the logistics or distribution module related to UoM.
  
  
  Explanation
  In SAP, when distribution data is updated (for example, during sales order processing, delivery, or inventory movements), quantities often need to be converted between different units of measure (e.g., from base unit to sales unit). If the system cannot find a valid conversion factor or encounters an unexpected value, it throws this system error.
  
  Solution
  
  
  Check UoM Conversion Factors:
  
  Go to transaction CUNI (Units of Measure) or CUNI1 to verify that the conversion factors between the involved units of measure exist and are correct.
  Ensure that the conversion factors are maintained properly and consistent.
  
  
  
  Verify Material Master Data:
  
  Check the material master (MM03) for the material involved.
  Verify the base unit of measure and any alternative units of measure.
  Ensure that the units are consistent and correctly maintained.
  
  
  
  Check Distribution Data:
  
  Review the distribution data being updated for inconsistencies.
  Look for any custom enhancements or user-exits that might manipulate UoM data during distribution updates.
  
  
  
  Debugging:
  
  If you have development access, debug the process where the error occurs to identify the exact point of failure.
  Look for calls to function modules or methods handling UoM conversion, such as CONVERSION_EXIT_* or standard SAP function modules like UNIT_CONVERSION_EXIT.
  
  
  
  SAP Notes and Support:
  
  Search for SAP Notes related to WRF_AT153 or UoM conversion errors.
  Apply any relevant patches or corrections recommended by SAP.
  
  
  
  Data Consistency Checks:
  
  Run consistency checks on material master and related tables.
  Use transaction MM02 to review and correct any anomalies.
  
  
  
  
  Related Information
  
  
  Transactions:
  
  CUNI / CUNI1 – Units of Measure maintenance
  MM03 – Display Material Master
  MM02 – Change Material Master
  Debugging tools (SE80, SE37, SE38)
  
  
  
  Common Function Modules:
  
  UNIT_CONVERSION_EXIT
  CONVERSION_EXIT_ALPHA_INPUT / CONVERSION_EXIT_ALPHA_OUTPUT
  
  
  
  SAP Notes:
  
  Check SAP Support Portal for notes related to WRF_AT153 or UoM conversion errors.
  Example note keywords: "WRF_AT153", "Unit of Measure conversion error", "distribution data update error".
  
  
  
  
  Summary
  The WRF_AT153 error is caused by problems in unit of measure conversion during distribution data updates. The solution involves verifying and correcting UoM conversion factors, ensuring material master data consistency, checking for custom code issues, and applying relevant SAP Notes or patches.
  If the problem persists after these checks, consider raising a support ticket with SAP, providing detailed logs and debugging information.