How To Fix M2480 - &: Conversion of source unit & to unit & not allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: M2 - LIS: Generating and updating info structures

• Message number: 480

• Message text: &: Conversion of source unit & to unit & not allowed

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message M2480 - &: Conversion of source unit & to unit & not allowed ?

  The SAP error message M2480 indicates that there is an issue with the conversion of units in a material document or transaction. This error typically arises when the system attempts to convert a source unit of measure (UoM) to a target unit of measure, but the conversion is not defined or allowed in the system.
  Cause:
  
  Missing Unit of Measure Conversion: The most common cause is that there is no conversion factor defined between the source unit and the target unit in the system.
  Incorrect Unit of Measure: The units being used may not be compatible or may not exist in the system.
  Configuration Issues: There may be issues in the configuration of the material master or the unit of measure settings in the SAP system.
  Data Entry Errors: Incorrect data entry during the transaction can lead to this error.
  
  Solution:
  
  
  Check Unit of Measure Settings:
  
  Go to the transaction code OMN1 (for maintaining units of measure) and check if the conversion between the source and target units is defined.
  If not, you can create a new conversion entry.
  
  
  
  Review Material Master Data:
  
  Use transaction code MM03 to display the material master data and check the units of measure defined for the material.
  Ensure that the base unit of measure and alternative units of measure are correctly set up.
  
  
  
  Verify Configuration:
  
  Check the configuration settings in the SAP system related to units of measure. This can be done through the SPRO transaction (SAP Reference IMG) under Logistics > Material Management > Basic Settings > Units of Measure.
  
  
  
  Data Entry Validation:
  
  Ensure that the data being entered in the transaction is correct and that the units of measure being used are valid and defined in the system.
  
  
  
  Consult Documentation:
  
  If the issue persists, consult SAP documentation or reach out to your SAP support team for further assistance.
  
  
  
  Related Information:
  
  Transaction Codes: 
  
  MM03 - Display Material Master
  OMN1 - Maintain Units of Measure
  SPRO - SAP Reference IMG for configuration
  
  
  SAP Notes: Check for any relevant SAP Notes that may address specific issues related to unit conversions.
  User Exits or BAdIs: If custom logic is involved, check for any user exits or BAdIs that might affect unit conversions.
  
  By following these steps, you should be able to identify and resolve the cause of the M2480 error in SAP.