How To Fix PAB042 - Conversion of unit of measure not possible

SAP Error Message - Details

• Message type: E = Error

• Message class: PAB - JIT calls

• Message number: 042

• Message text: Conversion of unit of measure not possible

What causes this issue?

When converting the quantities for the summarized JIT call from the base
unit of quantity to delivery unit, the required delivery unit could not
be found. Therefore it is not possible to convert quantities.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message PAB042 - Conversion of unit of measure not possible ?

  The SAP error message PAB042, which states "Conversion of unit of measure not possible," typically occurs when there is an issue with converting one unit of measure (UoM) to another in the context of materials management, inventory management, or production planning. This error can arise in various scenarios, such as during the creation of purchase orders, sales orders, or when performing inventory transactions.
  Causes of PAB042 Error
  
  
  Missing Conversion Factors: The most common cause is that the conversion factors between the units of measure are not defined in the system. For example, if you are trying to convert from kilograms to grams, the system needs to know how many grams are in a kilogram.
  
  
  Incorrect Unit of Measure: The unit of measure being used may not be valid for the material or may not be set up correctly in the material master.
  
  
  Inactive Units of Measure: The unit of measure may be inactive or not allowed for the specific material or transaction type.
  
  
  Configuration Issues: There may be issues in the configuration of the material master or the unit of measure settings in the SAP system.
  
  
  Data Inconsistencies: There may be inconsistencies in the data related to the material, such as missing or incorrect entries in the material master.
  
  
  Solutions to PAB042 Error
  
  
  Check Material Master: Go to the material master (transaction code MM03) and check the units of measure defined for the material. Ensure that the conversion factors are correctly set up.
  
  
  Define Conversion Factors: If conversion factors are missing, you can define them in the material master under the "Units of Measure" view. Make sure to specify the correct conversion factors between the different units of measure.
  
  
  Verify Unit of Measure Settings: Check the configuration settings for units of measure in the SAP system. This can be done through transaction code OME1 (for defining units of measure) and ensure that the units are active and correctly configured.
  
  
  Check for Inactive Units: Ensure that the unit of measure you are trying to use is active and valid for the material and the transaction you are performing.
  
  
  Review Transaction Data: If the error occurs during a specific transaction, review the data entered in that transaction for any discrepancies or incorrect entries.
  
  
  Consult Documentation: If you are unsure about the configuration or setup, refer to SAP documentation or consult with your SAP support team for guidance.
  
  
  Related Information
  
  
  Transaction Codes: 
  
  MM03: Display Material Master
  MM02: Change Material Master
  OME1: Define Units of Measure
  OME2: Define Conversion Factors
  
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. You can search for PAB042 in the SAP Support Portal.
  
  
  User Roles and Authorizations: Ensure that the user has the necessary authorizations to view and change material master data.
  
  
  By following these steps, you should be able to identify the cause of the PAB042 error and implement the necessary solutions to resolve it.