How To Fix BM803 - SI units must have specific conversion factors

SAP Error Message - Details

• Message type: E = Error

• Message class: BM - Development class BZME - units of measure

• Message number: 803

• Message text: SI units must have specific conversion factors

What causes this issue?

The conversion to the corresponding SI unit is maintained in the
measurement units table for each unit in accordance with the assigned
dimension. The conversion factors for the SI units must be as follows:
Numerator,,,,= 1
Denominator,,,,= 1
Exponent,,,,= 0
Additive constant,,,,= 0

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?

Choose the correct SI units under "Dimension" in the
<DS:TRANS.OMSC>Maintain measurement units</> and, if necessary, check
their conversion factors under "Measurement units".

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message BM803 - SI units must have specific conversion factors ?

  The SAP error message BM803, which states "SI units must have specific conversion factors," typically occurs in the context of material management or production planning when there is an issue with the unit of measure (UoM) configuration in the system. This error indicates that the system requires specific conversion factors for the Standard International (SI) units being used, and these factors are either missing or incorrectly configured.
  Cause:
  
  Missing Conversion Factors: The conversion factors for the SI units are not defined in the system.
  Incorrect Unit Configuration: The units of measure may not be properly configured in the material master or other relevant settings.
  Inconsistent Unit Usage: There may be inconsistencies in how units are defined or used across different materials or processes.
  Custom Development Issues: If there are custom developments or enhancements in the system, they may not be handling unit conversions correctly.
  
  Solution:
  
  
  Check Unit of Measure Configuration:
  
  Go to the transaction code CUNI (Unit of Measure Conversion) in SAP.
  Verify that the necessary conversion factors for the SI units are defined correctly.
  Ensure that the base unit of measure is set up properly for the materials in question.
  
  
  
  Review Material Master Data:
  
  Use transaction code MM03 to display the material master data.
  Check the unit of measure settings for the materials that are causing the error.
  Ensure that the correct base unit of measure is assigned and that conversion factors are defined.
  
  
  
  Adjust Custom Code:
  
  If there are custom programs or enhancements, review the code to ensure that it correctly handles unit conversions and adheres to the required SI unit standards.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for guidance on unit of measure configuration and best practices.
  
  
  
  Testing:
  
  After making changes, perform tests to ensure that the error no longer occurs and that the system behaves as expected.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP Notes can provide specific guidance or fixes.
  Training and Documentation: Consider reviewing SAP training materials or documentation related to material management and unit of measure configuration.
  Support: If the issue persists, consider reaching out to SAP support or your internal SAP team for further assistance.
  
  By following these steps, you should be able to resolve the BM803 error and ensure that your unit of measure configurations are correct.