How To Fix /IWBEP/CM_V4_MED166 - Precision not allowed on parameter '&1' of operation '&2'

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_V4_MED -

• Message number: 166

• Message text: Precision not allowed on parameter '&1' of operation '&2'

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_V4_MED166 - Precision not allowed on parameter '&1' of operation '&2' ?

  The SAP error message /IWBEP/CM_V4_MED166 Precision not allowed on parameter '&1' of operation '&2' typically occurs in the context of OData services when there is an issue with the precision of a parameter defined in the service's metadata. This error is often related to the way that numeric types are defined in the OData service, particularly when the precision and scale of decimal types are not compatible with the expected values.
  Cause:
  
  Precision and Scale Mismatch: The error usually arises when a parameter (often a decimal or numeric type) is defined with a precision that is not allowed or is incompatible with the operation being performed. For example, if a parameter is defined with a precision that exceeds the maximum allowed for that type in the OData service.
  Incorrect Metadata Definition: The metadata definition for the OData service may have incorrect specifications for the parameter types, leading to this error when the service is invoked.
  Data Type Limitations: The underlying database or the OData service may have limitations on the precision and scale of numeric types that are not being adhered to in the service definition.
  
  Solution:
  
  Check Parameter Definitions: Review the parameter definitions in the OData service's metadata. Ensure that the precision and scale for numeric types are defined correctly and are within acceptable limits.
  Adjust Precision and Scale: If you find that the precision of a parameter exceeds the allowed limits, adjust it to a valid value. For example, if a parameter is defined as Decimal(20,10), consider changing it to a lower precision if the underlying database does not support it.
  Update Service Metadata: If changes are made to the parameter definitions, ensure that the service metadata is updated accordingly. This may involve regenerating the service or updating the relevant data model.
  Test the Service: After making adjustments, test the OData service to ensure that the error no longer occurs and that the service behaves as expected.
  
  Related Information:
  
  OData Service Documentation: Refer to the official SAP documentation for OData services to understand the limitations and specifications for data types, precision, and scale.
  SAP Notes: Check for any relevant SAP Notes that may address known issues or provide guidance on handling precision-related errors in OData services.
  Debugging Tools: Utilize debugging tools within SAP to trace the execution of the OData service and identify where the precision issue is occurring.
  
  By following these steps, you should be able to resolve the error and ensure that your OData service operates correctly.