How To Fix CM_EHFND_REQ034 - Output variable "&1" is specified multiple times

SAP Error Message - Details

• Message type: E = Error

• Message class: CM_EHFND_REQ - Messages for Compliance Requirement

• Message number: 034

• Message text: Output variable "&1" is specified multiple times

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CM_EHFND_REQ034 - Output variable "&1" is specified multiple times ?

  The SAP error message CM_EHFND_REQ034 indicates that an output variable has been specified multiple times in a request. This typically occurs in the context of SAP's Enterprise Services or when working with OData services, where output parameters are defined for a service or function module.
  Cause:
  The error is caused by the following scenarios:
  
  Duplicate Output Variables: The same output variable is defined more than once in the service definition or in the function module.
  Incorrect Mapping: When mapping output parameters in a service implementation, if the same variable is inadvertently mapped multiple times, this error can occur.
  Service Definition Issues: If the service definition in the Service Builder (transaction SEGW) has been incorrectly configured, leading to duplicate entries.
  
  Solution:
  To resolve the error, you can follow these steps:
  
  
  Check Service Definition:
  
  Go to the Service Builder (transaction SEGW).
  Open the relevant project and check the output structure for the service.
  Ensure that each output variable is defined only once.
  
  
  
  Review Function Module:
  
  If you are using a function module, check the parameters in the function module definition (transaction SE37).
  Ensure that no output parameters are duplicated.
  
  
  
  Adjust Mappings:
  
  If you are using a mapping tool or framework, review the mappings to ensure that each output variable is mapped only once.
  
  
  
  Regenerate the Service:
  
  After making the necessary changes, regenerate the service to ensure that the changes take effect.
  You can do this by right-clicking on the project in SEGW and selecting "Generate".
  
  
  
  Test the Service:
  
  After making the changes, test the service again to ensure that the error has been resolved.
  
  
  
  Related Information:
  
  Transaction Codes: 
  
  SEGW (Service Builder)
  SE37 (Function Module)
  
  
  Documentation: Refer to SAP Help documentation for OData services and Enterprise Services for more details on defining and managing output parameters.
  SAP Notes: Check for any relevant SAP Notes that might address specific issues related to this error message.
  
  By following these steps, you should be able to identify and resolve the cause of the CM_EHFND_REQ034 error in your SAP environment.