How To Fix REMPT401 - Conversion of unit of measure &1 to unit of measure &2 not possible

SAP Error Message - Details

• Message type: E = Error

• Message class: REMPT - Message Class for REM Planning Table (Rel. 99)

• Message number: 401

• Message text: Conversion of unit of measure &1 to unit of measure &2 not possible

What causes this issue?

You want to convert a material to a unit of measure that you have not
maintained for the material.

System Response

The system cannot change the unit of measure.

How to fix this error?

Maintain the unit of measure you want for the material in the material
master record as an alternative unit of measure. (You enter the
alternative unit of measure under "Additional data --> Units of
measure".)
<DS:TRAN.MM02>Proceed with function</>

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message REMPT401 - Conversion of unit of measure &1 to unit of measure &2 not possible ?

  The SAP error message REMPT401 indicates that there is an issue with converting a unit of measure (UoM) from one type to another. This typically occurs in scenarios where the system is unable to find a valid conversion factor between the two specified units of measure.
  Cause:
  
  Missing Conversion Factors: The most common cause is that the conversion factors between the two units of measure are not defined in the system.
  Incorrect Unit of Measure: The specified units of measure may not be valid or recognized by the system.
  Configuration Issues: There may be issues in the configuration of the material master or the unit of measure settings in the system.
  Inconsistent Data: There could be inconsistencies in the data related to the material or the units of measure being used.
  
  Solution:
  
  
  Check Unit of Measure Configuration:
  
  Go to the transaction code CUNI (Unit of Measure Conversion) in SAP.
  Verify if the conversion factors between the two units of measure are defined. If not, you will need to create a new entry for the conversion.
  
  
  
  Review Material Master Data:
  
  Check the material master data for the material in question using transaction code MM03.
  Ensure that the units of measure are correctly defined in the material master.
  
  
  
  Validate UoM Settings:
  
  Ensure that the units of measure are correctly set up in the system. This includes checking the base unit of measure and any alternative units of measure.
  
  
  
  Check for Custom Code:
  
  If there are any custom developments or enhancements that might affect unit conversions, review them to ensure they are functioning correctly.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for additional guidance on unit of measure conversions.
  
  
  
  Related Information:
  
  Transaction Codes:
  
  CUNI: Unit of Measure Conversion
  MM03: Display Material
  MM02: Change Material
  
  
  SAP Notes: Check for any relevant SAP Notes that might address known issues or provide additional guidance on this error.
  User Exits and BAdIs: If you have custom logic implemented, review any user exits or BAdIs that might be affecting unit conversions.
  
  By following these steps, you should be able to identify the cause of the REMPT401 error and implement a solution to resolve it. If the issue persists, consider reaching out to your SAP support team for further assistance.