How To Fix /IWBEP/CM_V4_MED120 - Precision/scale value combination invalid for return of operation '&1'

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_V4_MED -

• Message number: 120

• Message text: Precision/scale value combination invalid for return of operation '&1'

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_V4_MED120 - Precision/scale value combination invalid for return of operation '&1' ?

  The SAP error message /IWBEP/CM_V4_MED120 typically indicates an issue with the precision and scale values of a numeric field in an OData service. This error occurs when the data being returned from an operation does not conform to the expected precision and scale defined in the OData service metadata.
  Cause:
  
  Precision and Scale Mismatch: The numeric value being returned has a precision (total number of digits) or scale (number of digits to the right of the decimal point) that exceeds what is defined in the OData service metadata.
  Data Type Issues: The data type of the field in the backend system may not match the expected data type in the OData service.
  Incorrect Mapping: There may be incorrect mapping between the backend data model and the OData service definition.
  
  Solution:
  
  Check Metadata: Review the OData service metadata (usually accessible via the service URL with $metadata appended) to understand the expected precision and scale for the fields in question.
  Adjust Backend Data: Ensure that the data being returned from the backend system adheres to the defined precision and scale. This may involve rounding or truncating values in the backend logic.
  Modify OData Service: If the backend data is correct and needs to be preserved, consider modifying the OData service definition to accommodate the required precision and scale.
  Data Type Consistency: Ensure that the data types in the backend system match those defined in the OData service. If necessary, adjust the data types in the backend.
  Debugging: Use transaction codes like /IWFND/ERROR_LOG or /IWBEP/ERROR_LOG to get more details about the error and identify the specific field causing the issue.
  
  Related Information:
  
  OData Service Development: Familiarize yourself with OData service development in SAP, including how to define entity types and properties with the correct precision and scale.
  SAP Notes: Check for any relevant SAP Notes that may address known issues or provide guidance on handling precision and scale in OData services.
  Testing: Use tools like Postman or SAP Gateway Client to test the OData service and observe the responses for different inputs to identify the problematic data.
  
  By following these steps, you should be able to resolve the error and ensure that your OData service functions correctly.