How To Fix CO844 - Units of measure for material & cannot be converted (see long text)

SAP Error Message - Details

• Message type: E = Error

• Message class: CO - PPC order processing messages

• Message number: 844

• Message text: Units of measure for material & cannot be converted (see long text)

What causes this issue?

The alternative unit of measure &V3& has been created for material &V1&
. This cannot be converted to the base unit of measure &V4& (for
example, because the conversion factor has since been deleted from the
material master).

System Response

For material &V1& the system calculates using a conversion factor of
1:1 between the alternative unit of measure and the base unit of
measure.

How to fix this error?

Check the units in the material master and change them if necessary.
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Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CO844 - Units of measure for material & cannot be converted (see long text) ?

  The SAP error message CO844 indicates that there is an issue with the conversion of units of measure (UoM) for a specific material in the context of a production order or cost object. This error typically arises when the system is unable to convert the units of measure from one form to another due to a configuration issue or missing data.
  Cause:
  
  
  Missing Unit of Measure Conversion: The primary cause of this error is that there is no defined conversion between the units of measure for the material in question. For example, if you are trying to convert from kilograms to grams, but the conversion factor is not defined in the system, this error will occur.
  
  
  Incorrect Configuration: The units of measure may not be correctly configured in the material master data. This can include incorrect settings in the UoM table or missing entries.
  
  
  Material Master Data Issues: The material master may not have the necessary UoM settings, or the UoM used in the production order may not match the UoM defined in the material master.
  
  
  Inconsistent UoM in BOM: If the Bill of Materials (BOM) for the material uses a different unit of measure than what is being used in the production order, this can lead to conversion issues.
  
  
  Solution:
  
  
  Check Unit of Measure Settings:
  
  Go to the material master (transaction code MM03) and check the UoM settings for the material. Ensure that the base unit of measure and any alternative units of measure are correctly defined.
  Verify that the conversion factors between the units of measure are correctly set up in the system.
  
  
  
  Define UoM Conversions:
  
  If conversions are missing, you can define them in the SAP system. This can be done through transaction code CUNI (Unit of Measure Conversion) where you can create or modify conversion factors.
  
  
  
  Review BOM and Routing:
  
  Check the BOM and routing for the material to ensure that the units of measure used are consistent with those defined in the material master. If there are discrepancies, update the BOM or routing accordingly.
  
  
  
  Check Configuration:
  
  Ensure that the configuration settings for units of measure in the system are correct. This may involve checking the settings in the customizing (SPRO) related to material management and production planning.
  
  
  
  Consult Long Text:
  
  The error message CO844 often has a long text that provides additional details about the issue. You can view this long text by clicking on the error message in the SAP GUI. This may give you more specific information about what is causing the error.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  MM03: Display Material Master
  CUNI: Maintain Units of Measure
  CS03: Display BOM
  CO03: Display Production Order
  
  
  
  SAP Notes: Check for any relevant SAP Notes that may address specific issues related to unit of measure conversions.
  
  
  Documentation: Review SAP documentation on material management and production planning for best practices regarding unit of measure handling.
  
  
  By following these steps, you should be able to identify and resolve the CO844 error in SAP.