How To Fix NAA108 - Error during conversion of billing unit &1 to scale unit &2

SAP Error Message - Details

• Message type: E = Error

• Message class: NAA - Subsequent settlement (Purchasing)

• Message number: 108

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

What causes this issue?

Conversion of billing unit &1& to scale unit &V2& of the scale basis is
not possible.

System Response

Business volume data is not updated as the business volume for the scale
basis is missing.

How to fix this error?

Ensure that the system is able to determine the business volume in the
form given above.
A suitable unit conversion should be defined for this in the material
master (alternative unit of measure) or info record. The system used
this data (info record, material master) to carry out the above
conversion, but without success.
If necessary, contact your system administrator.

AUFRUF DER TRANSAKTION MATERIALSTAMM AENDERN

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

<DS:TRAN.MM02>Perform function</>
If you have the necessary authorization, you can maintain the material
master directly.
AUFRUF DER TRANSAKTION MATERIALSTAMM AENDERN
<DS:TRAN.MM02>Perform function</>
If you have the necessary authorization, you can maintain the info
record directly.
AUFRUF DER TRANSAKTION INFOSATZ AENDERN
<DS:TRAN.ME12>Perform function</>
ENDIF
The settlement document concerned has the 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 NAA108 - Error during conversion of billing unit &1 to scale unit &2 ?

  The SAP error message NAA108, which states "Error during conversion of billing unit &1 to scale unit &2," typically occurs in the context of billing or invoicing processes within SAP. This error indicates that there is an issue with converting a billing unit of measure to a scale unit of measure, which can happen for various reasons.
  Causes:
  
  Unit of Measure Configuration: The billing unit and scale unit may not be properly configured in the system. This can include missing or incorrect conversion factors between the units of measure.
  Data Inconsistencies: There may be inconsistencies in the master data, such as incorrect entries in the material master or customer master records.
  Missing Conversion Factors: The conversion factors between the billing unit and scale unit may not be defined in the system.
  Incorrect Settings in Pricing Procedure: The pricing procedure may not be set up correctly to handle the conversion between the units of measure.
  Custom Code Issues: If there are custom enhancements or modifications in the billing process, they may be causing the error.
  
  Solutions:
  
  
  Check Unit of Measure Configuration:
  
  Go to the transaction code CUNI (Unit of Measure Conversion) and verify that the conversion factors between the billing unit and scale unit are correctly defined.
  Ensure that both units of measure are active and correctly configured in the system.
  
  
  
  Review Master Data:
  
  Check the material master (transaction code MM03) and customer master (transaction code XD03) for any inconsistencies related to units of measure.
  Ensure that the correct units of measure are assigned to the relevant materials and customers.
  
  
  
  Verify Pricing Procedure:
  
  Review the pricing procedure assigned to the sales document type to ensure it is set up to handle the conversion of units of measure correctly.
  Check the condition records related to pricing and ensure they are correctly defined.
  
  
  
  Check for Custom Code:
  
  If there are any custom enhancements or modifications in the billing process, review the code to identify any potential issues that may be causing the error.
  
  
  
  Consult SAP Notes:
  
  Search for relevant SAP Notes in the SAP Support Portal that may address this specific error message or provide additional guidance.
  
  
  
  Testing:
  
  After making any changes, perform testing to ensure that the error no longer occurs and that billing documents can be processed successfully.
  
  
  
  Related Information:
  
  Transaction Codes: 
  
  CUNI for Unit of Measure Conversion
  MM03 for Material Master Display
  XD03 for Customer Master Display
  
  
  SAP Documentation: Refer to SAP Help documentation for detailed information on unit of measure configuration and billing processes.
  SAP Community: Engage with the SAP Community forums for insights and solutions from other users who may have encountered similar issues.
  
  If the problem persists after following these steps, it may be necessary to involve your SAP support team or consult with SAP directly for further assistance.