How To Fix QT423 - Error converting the unit of measure

SAP Error Message - Details

• Message type: E = Error

• Message class: QT - QM: Inspection during production (with inspection points)

• Message number: 423

• Message text: Error converting the unit of measure

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 QT423 - Error converting the unit of measure ?

  The SAP error message QT423, which states "Error converting the unit of measure," typically occurs when there is an issue with the conversion of units of measure in the system. This can happen in various contexts, such as during the creation of a sales order, purchase order, or when processing inventory movements.
  Causes of QT423 Error
  
  
  Incorrect Unit of Measure Configuration: The unit of measure (UoM) defined for the material may not be correctly configured in the system. This includes issues with the base unit of measure or alternative units of measure.
  
  
  Missing Conversion Factors: If the conversion factors between different units of measure are not defined or are incorrect, the system will not be able to convert the units properly.
  
  
  Material Master Data Issues: The material master data may have inconsistencies or missing information related to units of measure.
  
  
  Incompatible UoM: The units of measure being used may not be compatible with each other, leading to conversion errors.
  
  
  Custom Code or User Exits: If there are custom developments or user exits that manipulate unit of measure conversions, they may be causing the error.
  
  
  Solutions to QT423 Error
  
  
  Check Material Master Data:
  
  Go to the material master (transaction code MM03) and check the unit of measure settings.
  Ensure that the base unit of measure and any alternative units of measure are correctly defined.
  
  
  
  Review UoM Conversion Factors:
  
  Check the conversion factors between the units of measure in the material master.
  Ensure that all necessary conversion factors are defined and accurate.
  
  
  
  Verify UoM Configuration:
  
  Use transaction code OME4 to check the configuration of units of measure in the system.
  Ensure that the units of measure are set up correctly in the system.
  
  
  
  Check for Custom Code:
  
  If there are any custom developments or user exits that affect unit of measure conversions, review them for potential issues.
  
  
  
  Test with Different UoM:
  
  Try using different units of measure to see if the error persists. This can help identify if the issue is specific to certain units.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that may address this specific error message.
  
  
  
  Contact SAP Support:
  
  If the issue persists after checking the above points, consider reaching out to SAP support for further assistance.
  
  
  
  Related Information
  
  Transaction Codes: MM03 (Display Material), OME4 (Maintain Units of Measure).
  SAP Documentation: Refer to SAP Help documentation for detailed information on unit of measure configuration and management.
  User Forums: SAP Community and other user forums can provide insights and solutions from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify and resolve the cause of the QT423 error in SAP.