How To Fix GW013 - Unknown opcode; &1

SAP Error Message - Details

• Message type: E = Error

• Message class: GW - Message Texts for Gateway

• Message number: 013

• Message text: Unknown opcode; &1

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.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

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Smart SAP Assistant

• What is the cause and solution for SAP error message GW013 - Unknown opcode; &1 ?

  The SAP error message GW013 "Unknown opcode; &1" typically occurs in the context of SAP Gateway services, particularly when there is an issue with the communication between the SAP system and the client (such as an application or a web service). The "opcode" refers to an operation code that the system does not recognize, which can happen for several reasons.
  Causes:
  
  Incorrect Service Registration: The service might not be properly registered in the SAP Gateway.
  Version Mismatch: There could be a mismatch between the client and server versions, leading to unrecognized opcodes.
  Network Issues: Problems in the network can lead to incomplete or corrupted requests.
  Custom Development Issues: If there are custom OData services or enhancements, they might not be implemented correctly.
  Authorization Issues: The user might not have the necessary authorizations to access the service, leading to unexpected behavior.
  
  Solutions:
  
  
  Check Service Registration:
  
  Use transaction code /IWFND/MAINT_SERVICE to check if the service is correctly registered and activated.
  Ensure that the service is active and that the relevant system alias is configured correctly.
  
  
  
  Review Client Requests:
  
  Inspect the requests being sent from the client to ensure they are correctly formatted and targeting the right service.
  Use tools like Postman or Fiddler to analyze the requests and responses.
  
  
  
  Check for Version Compatibility:
  
  Ensure that the client application and the SAP Gateway are compatible in terms of versions.
  Update the client or the SAP system if necessary.
  
  
  
  Debugging:
  
  If you have access to the backend, you can use transaction code SE80 or SE37 to debug the service implementation and check for any issues in the code.
  
  
  
  Authorization Check:
  
  Verify that the user has the necessary authorizations to access the service. You can check this in transaction SU53 after the error occurs.
  
  
  
  Review Logs:
  
  Check the SAP Gateway logs using transaction /IWFND/ERROR_LOG for more detailed error messages that can provide additional context.
  
  
  
  Consult Documentation:
  
  Review the SAP documentation for the specific service you are working with to ensure that you are using it correctly.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues related to the specific version of SAP Gateway you are using.
  Community Forums: SAP Community and other forums can be helpful for finding similar issues faced by other users.
  SAP Support: If the issue persists, consider reaching out to SAP Support for assistance.
  
  By following these steps, you should be able to identify the cause of the GW013 error and implement a solution.