How To Fix NAA390 - Overflow, calculat. error or similar during conversion of unit &1 to &2

SAP Error Message - Details

• Message type: E = Error

• Message class: NAA - Subsequent settlement (Purchasing)

• Message number: 390

• Message text: Overflow, calculat. error or similar during conversion of unit &1 to &2

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

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Smart SAP Assistant

• What is the cause and solution for SAP error message NAA390 - Overflow, calculat. error or similar during conversion of unit &1 to &2 ?

  The SAP error message NAA390, which indicates an "Overflow, calculation error or similar during conversion of unit &1 to &2," typically occurs during unit conversion processes in SAP. This error can arise due to various reasons, including:
  Causes:
  
  Data Type Limitations: The values being converted may exceed the maximum limits of the data types used in the conversion process.
  Incorrect Unit Configuration: The units involved in the conversion may not be properly defined or configured in the system.
  Invalid Values: The source value being converted may be invalid or not within the expected range.
  Decimal Precision Issues: The precision of the decimal values may lead to overflow if the result exceeds the allowed number of decimal places.
  Unit of Measure (UoM) Settings: There may be issues with the settings of the units of measure in the system, such as missing conversion factors.
  
  Solutions:
  
  Check Data Values: Verify the values being converted to ensure they are within acceptable limits and valid for the units involved.
  Review Unit Configuration: Check the configuration of the units of measure in the SAP system. Ensure that the conversion factors are correctly defined in the relevant tables (e.g., T006 for units of measure).
  Adjust Decimal Places: If applicable, adjust the decimal precision settings for the fields involved in the conversion to accommodate larger values.
  Debugging: If you have access to debugging tools, you can trace the conversion process to identify where the overflow occurs.
  SAP Notes: Check for any relevant SAP Notes or patches that may address this specific error. SAP frequently releases updates that fix known issues.
  Consult Documentation: Review SAP documentation or help resources for additional guidance on unit conversions and related error messages.
  
  Related Information:
  
  Transaction Codes: You may want to look into transaction codes like CUNI (for unit of measure conversion) to review and manage unit settings.
  SAP Community: Engaging with the SAP Community forums can provide insights from other users who may have encountered similar issues.
  Support: If the issue persists, consider reaching out to SAP support for assistance, especially if it is impacting business processes.
  
  By following these steps, you should be able to identify the root cause of the NAA390 error and implement a suitable solution.