How To Fix ATP_SE042 - Unit of measure conversion not possible: &1 (only ISO codes possible)

SAP Error Message - Details

• Message type: E = Error

• Message class: ATP_SE - Message class for ATP-Services

• Message number: 042

• Message text: Unit of measure conversion not possible: &1 (only ISO codes possible)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message ATP_SE042 - Unit of measure conversion not possible: &1 (only ISO codes possible) ?

  The SAP error message ATP_SE042 indicates that there is an issue with unit of measure (UoM) conversion in the system. Specifically, it states that the conversion is not possible for the specified unit of measure (denoted as &1) and that only ISO codes are acceptable for this conversion.
  Cause:
  
  Non-ISO Unit of Measure: The unit of measure being used is not an ISO standard code. SAP requires that units of measure used in certain contexts (like ATP - Available to Promise) conform to ISO standards.
  Configuration Issues: There may be a configuration issue in the material master or in the settings for the specific transaction or module you are using.
  Missing Conversion Factors: The system may not have the necessary conversion factors defined for the units of measure involved.
  Data Entry Errors: There could be a typo or incorrect entry in the unit of measure field.
  
  Solution:
  
  Check Unit of Measure: Verify that the unit of measure you are trying to use is an ISO standard code. You can refer to the ISO 4217 standard for currency codes or ISO 8601 for date/time formats, depending on the context.
  Update Material Master: If the unit of measure is not ISO-compliant, consider updating the material master record to use an appropriate ISO unit of measure.
  Define Conversion Factors: If you need to use a non-ISO unit of measure, ensure that the necessary conversion factors are defined in the system. This can be done in the material master under the "Units of Measure" section.
  Check Configuration: Review the configuration settings in the relevant modules (like MM, SD, or PP) to ensure that they are set up correctly for unit of measure conversions.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on unit of measure handling in your version of SAP.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Transaction Codes: Use transaction codes like MM02 (Change Material) to check and update material master data, or OMN1 to maintain unit of measure settings.
  User Exits and BAdIs: If you have custom developments, check if there are any user exits or BAdIs that might be affecting unit of measure handling.
  Testing: After making changes, perform tests to ensure that the unit of measure conversion works as expected.
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP support team or a technical consultant for further assistance.