How To Fix /IWBEP/CM_V4_MED149 - MaxLength not possible on return of operation '&1'

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_V4_MED -

• Message number: 149

• Message text: MaxLength not possible 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_MED149 - MaxLength not possible on return of operation '&1' ?

  The SAP error message /IWBEP/CM_V4_MED149 MaxLength not possible on return of operation '&1' typically occurs in the context of SAP Gateway and OData services. This error indicates that there is a problem with the maximum length of a data field being returned in an OData response. Here’s a breakdown of the cause, potential solutions, and related information:
  Cause:
  
  Data Length Exceeds Limit: The error usually arises when the length of a string or a data field in the response exceeds the maximum length defined in the OData service metadata or the underlying database table.
  Inconsistent Metadata: There may be a mismatch between the data model defined in the OData service and the actual data being returned from the backend.
  Incorrect Data Type: The data type defined in the OData service may not match the data type of the actual data being returned, leading to length issues.
  
  Solutions:
  
  Check Data Length: Review the data being returned by the operation specified in the error message. Ensure that the length of the data does not exceed the maximum length defined in the OData service metadata.
  Adjust Metadata: If the data length is valid but exceeds the defined maximum length, consider adjusting the metadata of the OData service to accommodate the larger data size. This can be done by modifying the data type in the service definition.
  Modify Backend Logic: If the data being returned is not necessary or can be truncated, consider modifying the backend logic to return a shorter version of the data.
  Regenerate OData Service: If changes are made to the underlying data model or database, regenerate the OData service to ensure that the metadata is in sync with the backend.
  Check for Annotations: Ensure that any annotations related to maximum length in the OData service are correctly defined.
  
  Related Information:
  
  SAP Gateway: This error is related to the SAP Gateway framework, which is used to expose SAP data and services as OData services.
  OData Services: Understanding OData service definitions, including entity types and properties, is crucial for troubleshooting this error.
  Transaction Codes: You may use transaction codes like /IWFND/MAINT_SERVICE to manage OData services and /IWBEP/REG_SERVICE to register or update services.
  Debugging: Use the SAP Gateway Client (transaction /IWFND/GW_CLIENT) to test the OData service and inspect the response for any anomalies.
  
  By following these steps, you should be able to identify the root cause of the error and implement a suitable solution. If the issue persists, consider reaching out to SAP support or consulting the SAP community for further assistance.