How To Fix /IWPGW/PGW_SERVICE204 - &1 can be accessed either with key or filterable parameter

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWPGW/PGW_SERVICE -

• Message number: 204

• Message text: &1 can be accessed either with key or filterable parameter

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWPGW/PGW_SERVICE204 - &1 can be accessed either with key or filterable parameter ?

  The SAP error message /IWPGW/PGW_SERVICE204 typically indicates an issue related to the way a service is being accessed in the SAP Gateway. This error suggests that the service can be accessed either with a key or with filterable parameters, but not both at the same time. Here’s a breakdown of the cause, potential solutions, and related information:
  Cause:
  
  Service Access Method: The error arises when a request is made to access a service using both a key (which uniquely identifies a specific entity) and filterable parameters (which are used to filter a set of entities). The SAP Gateway expects either one of these methods to be used, but not both simultaneously.
  Incorrect URL or Query Parameters: The URL or the query parameters in the request may be incorrectly formed, leading to the system being unable to determine how to process the request.
  
  Solution:
  
  
  Review the Request: Check the request being made to the service. Ensure that you are either using a key (e.g., an ID) or filterable parameters, but not both. For example:
  
  If you are trying to access a specific entity, use the key: /service/entitySet('keyValue')
  If you are trying to filter a set of entities, use filterable parameters: /service/entitySet?$filter=property eq 'value'
  
  
  
  Modify the Service Call: Depending on your requirement, modify the service call to use only one method of access:
  
  If you need a specific record, use the key.
  If you need a list of records based on certain criteria, use filterable parameters.
  
  
  
  Check Service Metadata: Review the service metadata (e.g., using the /IWFND/MAINT_SERVICE transaction) to understand the expected parameters and how the service is designed to be accessed.
  
  
  Debugging: If you have access to the backend, you can debug the service implementation to see how the parameters are being processed and identify where the conflict arises.
  
  
  Related Information:
  
  SAP Gateway Documentation: Refer to the official SAP Gateway documentation for more details on how to structure requests and understand the service behavior.
  Transaction Codes: Use transaction codes like /IWFND/MAINT_SERVICE to manage and maintain your OData services.
  SAP Community: Engage with the SAP Community forums for insights and solutions from other users who may have encountered similar issues.
  
  By following these steps, you should be able to resolve the error and successfully access the desired service in SAP Gateway.