How To Fix NAA555 - Error during conversion of unit of measure &1 to scale unit &2

SAP Error Message - Details

• Message type: E = Error

• Message class: NAA - Subsequent settlement (Purchasing)

• Message number: 555

• Message text: Error during conversion of unit of measure &1 to scale unit &2

What causes this issue?

You cannot convert unit of measure &V1& to scale unit &V2& in the scale
basis.

System Response

The business volume data could not be updated, as the business volume
for the scale basis is missing.

How to fix this error?

Ensure that the system can define the business volume in the form given
above.
You have to define a suitable unit conversion in the material master
(alternative unit of measure) or info record. The system tried
unsuccessfully to carry out the conversion with the above data (info
record, material master).
Remember that material and info records may be missing in the customer
settlements making it impossible to carry out a conversion.
Contact your system administrator.

If you have the relevant authorization, you can maintain the material
master now.
CHANGE MATERIAL MASTER TRANSACTION CALL
<DS:TRAN.MM02>EXECUTE FUNCTION</>
If you have the relevant authorization, you can maintain the info record
now.
CHANGE INFO RECORD TRANSACTION CALL
<DS:TRAN.ME12>XECUTE FUNCTION</>
ENDIF
The customer settlement concerned has number &V3&, item &V4&.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message NAA555 - Error during conversion of unit of measure &1 to scale unit &2 ?

  The SAP error message NAA555, which states "Error during conversion of unit of measure &1 to scale unit &2," typically occurs when there is an issue with converting a unit of measure (UoM) in the system. This can happen in various contexts, such as during material movements, inventory management, or when processing transactions that involve different units of measure.
  Causes:
  
  Incorrect Unit of Measure Configuration: The unit of measure may not be properly defined in the system, or there may be missing conversion factors between the units.
  Missing Conversion Factors: If the conversion factors between the source unit of measure and the target scale unit are not defined, the system will not be able to perform the conversion.
  Data Entry Errors: Incorrect data entry when specifying units of measure in transactions can lead to this error.
  Inconsistent UoM Usage: Using a unit of measure that is not compatible with the expected units in the context of the transaction can trigger this error.
  
  Solutions:
  
  
  Check Unit of Measure Configuration:
  
  Go to the transaction code CUNI (Unit of Measure Conversion) to review the configuration of the units of measure involved.
  Ensure that both the source unit of measure (&1) and the target scale unit (&2) are defined correctly.
  
  
  
  Define Missing Conversion Factors:
  
  If conversion factors are missing, you can define them in the same transaction (CUNI). Make sure to specify the correct conversion ratio between the units.
  
  
  
  Review Transaction Data:
  
  Check the transaction data where the error occurred. Ensure that the units of measure entered are valid and correctly specified.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help resources for specific details on unit of measure handling in the context of your transaction.
  
  
  
  Testing:
  
  After making changes, perform a test transaction to ensure that the error is resolved.
  
  
  
  Related Information:
  
  Unit of Measure Types: Understand the different types of units of measure (e.g., base unit, alternative unit) and how they interact in SAP.
  SAP Notes: Check for any relevant SAP Notes that may address known issues or provide additional guidance on this error.
  User Exits and Enhancements: If custom logic is involved in unit conversions, review any user exits or enhancements that may affect the conversion process.
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP support team or reach out to SAP support for further assistance.