How To Fix /IWBEP/CM_EQ020 - Unsupported filter string

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_EQ -

• Message number: 020

• Message text: Unsupported filter string

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_EQ020 - Unsupported filter string ?

  The SAP error message /IWBEP/CM_EQ020 Unsupported filter string typically occurs in the context of OData services when there is an issue with the filter string being used in a query. This error indicates that the filter string provided in the OData request is not supported or is incorrectly formatted.
  Causes:
  
  Invalid Syntax: The filter string may contain syntax errors or unsupported operators.
  Unsupported Functions: The filter may be using functions or operations that are not supported by the OData service.
  Data Type Mismatch: The filter may be trying to compare incompatible data types.
  Service Limitations: The OData service may not support certain filter expressions due to its configuration or limitations in the underlying data model.
  Incorrect Field Names: The filter may reference fields that do not exist in the entity set or are misspelled.
  
  Solutions:
  
  Check Syntax: Review the filter string for any syntax errors. Ensure that it follows the OData query syntax rules.
  Validate Field Names: Ensure that all field names used in the filter are correct and exist in the entity set.
  Use Supported Functions: Refer to the OData service documentation to ensure that the functions and operators used in the filter are supported.
  Data Type Consistency: Ensure that the values being compared in the filter are of compatible data types.
  Test with Simple Filters: Start with a simple filter and gradually add complexity to identify which part of the filter is causing the issue.
  Check Service Metadata: Use the $metadata endpoint of the OData service to review the structure of the entity set and confirm the available fields and their types.
  
  Related Information:
  
  OData Documentation: Familiarize yourself with the OData protocol and its query options. The official OData documentation can provide insights into supported operations and syntax.
  SAP Notes: Check SAP Notes and Knowledge Base Articles for any known issues or updates related to the specific version of the OData service you are using.
  Debugging Tools: Use tools like Postman or SAP Gateway Client to test OData queries and see the raw responses, which can help in troubleshooting.
  
  If the issue persists after checking the above points, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.