How To Fix /IWBEP/CM_V4_MED121 - Precision/scale value settings not allowed on return of operation '&1'

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_V4_MED -

• Message number: 121

• Message text: Precision/scale value settings not allowed on return of operation '&1'

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_V4_MED121 - Precision/scale value settings not allowed on return of operation '&1' ?

  The SAP error message /IWBEP/CM_V4_MED121 Precision/scale value settings not allowed on return of operation '&1' typically occurs in the context of OData services when there is an issue with the precision and scale settings of a numeric field in the response of an OData operation. This error is related to the way that the OData service is configured to handle numeric data types.
  Cause:
  
  Precision and Scale Mismatch: The error usually arises when the precision and scale settings defined in the data model do not match the values being returned by the operation. For example, if a field is defined to have a precision of 10 and a scale of 2, but the returned value exceeds this definition, the error will occur.
  Data Type Definition: The data type of the field in the backend (ABAP) might not be compatible with the expected OData type, leading to issues when the OData service tries to serialize the response.
  OData Model Configuration: There might be a misconfiguration in the OData model where the precision and scale are not properly defined for the fields in question.
  
  Solution:
  
  Check Data Model: Review the data model in the backend (ABAP) to ensure that the precision and scale settings for the numeric fields are correctly defined. Adjust them if necessary.
  Adjust OData Service: If you are using a custom OData service, ensure that the metadata (e.g., in the service definition) correctly reflects the precision and scale of the fields being returned.
  Modify Return Values: If the backend logic is returning values that exceed the defined precision and scale, consider modifying the logic to ensure that the returned values conform to the defined limits.
  Regenerate OData Service: If changes are made to the data model or the OData service definition, regenerate the OData service to ensure that the changes are reflected in the service metadata.
  Testing: After making the necessary adjustments, test the OData service to ensure that the error no longer occurs and that the data is returned correctly.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide guidance on handling precision and scale issues in OData services.
  OData Documentation: Review the official SAP documentation on OData services, particularly sections related to data types, precision, and scale.
  Debugging: Use transaction codes like /IWFND/ERROR_LOG to check for additional error details or logs that might provide more context on the issue.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to resolve it.