How To Fix NAA391 - Overflow, calc. error for conversion factors from unit &1 to &2

NAA391 - Overview

• Message type: E = Error

• Message class: NAA - Subsequent settlement (Purchasing)

• Message number: 391

• Message text: Overflow, calc. error for conversion factors from unit &1 to &2

Self-Explanatory Message

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NAA391 - Details

• The SAP error message NAA391, which indicates an "Overflow, calc. error for conversion factors from unit &1 to &2," typically occurs during the conversion of measurement units in SAP, particularly in the context of materials management or production planning. This error suggests that there is an issue with the conversion factors defined between the two units of measure.
  
  Cause:
  
  Invalid Conversion Factors: The conversion factors between the two units of measure may not be defined correctly or may be missing.
  Overflow in Calculation: The calculation of the conversion factor may result in a value that exceeds the maximum limit that can be handled by the system, leading to an overflow error.
  Data Type Limitations: The data types used for storing conversion factors may not be sufficient to handle the values being processed.
  Unit of Measure Configuration: There may be issues in the configuration of the units of measure in the system, such as incorrect settings