How To Fix AH870 - Not possible to convert unit of measurement &1 to &2

SAP Error Message - Details

• Message type: E = Error

• Message class: AH - IS-U billing (master data)

• Message number: 870

• Message text: Not possible to convert unit of measurement &1 to &2

What causes this issue?

Unit of measurement &V1& could not be converted to &V2&. A more
detailed description of the cause of termination can be found in the
next message.
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?

Refer to this <DS:TX.ISU_BI_DIMENSION>note</> concerning the correct
use of units of measurement in IS-U.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AH870 - Not possible to convert unit of measurement &1 to &2 ?

  The SAP error message AH870 indicates that there is an issue with converting a unit of measurement (UoM) from one type to another. This typically occurs in scenarios where a conversion is attempted between incompatible units, or when the necessary conversion factors are not defined in the system.
  Cause:
  
  Incompatible Units: The source unit of measurement (UoM) cannot be converted to the target UoM because they are fundamentally different (e.g., trying to convert meters to liters).
  Missing Conversion Factors: The conversion factors between the two units are not defined in the system. SAP requires these factors to perform the conversion.
  Incorrect Configuration: The configuration for units of measurement in the system may be incorrect or incomplete.
  Data Entry Errors: There may be errors in the data entry where the UoM is incorrectly specified.
  
  Solution:
  
  Check UoM Compatibility: Verify that the units you are trying to convert are compatible. For example, ensure that both units are measuring the same type of quantity (e.g., weight, volume, length).
  Define Conversion Factors:
  
  Go to the transaction code CUNI (Unit of Measure Conversion) in SAP.
  Check if the conversion factors between the two units are defined. If not, you will need to create a new entry for the conversion.
  
  
  Review UoM Configuration:
  
  Ensure that the units of measurement are correctly configured in the system. This can be done in the configuration settings under Logistics General > Material Master > Basic Settings > Units of Measure.
  
  
  Correct Data Entry: Review the data entry for any mistakes in specifying the UoM. Ensure that the correct units are being used in the transaction.
  Consult Documentation: If you are unsure about the units or the conversion factors, refer to SAP documentation or consult with a functional consultant who specializes in material management or logistics.
  
  Related Information:
  
  Transaction Codes: 
  
  CUNI: For managing unit of measure conversions.
  MM03: To view material master data and check UoM settings.
  
  
  SAP Notes: Check for any relevant SAP Notes that may address specific issues related to UoM conversions.
  User Exits and BAdIs: If custom logic is involved in UoM conversion, review any user exits or BAdIs that may affect the conversion process.
  
  By following these steps, you should be able to identify the cause of the AH870 error and implement a solution to resolve it.