How To Fix SIW028 - Errors occurred during proxy generation; see log

SAP Error Message - Details

• Message type: E = Error

• Message class: SIW - Service Implementation Workbench

• Message number: 028

• Message text: Errors occurred during proxy generation; see log

What causes this issue?

The system found an error during the proxy generation process.

System Response

The system does not generate the proxy.

How to fix this error?

You must first (re)generate the proxy.
If this is not possible in transaction <DS><DS:TRAN.SIW>SIW</></>, go to
transaction <DS><DS:TRAN.SPROXY>SPROXY</></> and try to generate the
proxy here. This transaction will provide more detailed error
information.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SIW028 - Errors occurred during proxy generation; see log ?

  The SAP error message SIW028 indicates that there were errors during the proxy generation process. This typically occurs in the context of SAP Process Integration (PI) or SAP Process Orchestration (PO) when generating proxies for web services or when working with service interfaces.
  Causes:
  
  Configuration Issues: Incorrect configuration settings in the Integration Builder or Service Registry can lead to proxy generation errors.
  Missing Dependencies: Required libraries or dependencies may be missing or not properly configured.
  Syntax Errors: Errors in the WSDL or XSD files that define the web service can cause the proxy generation to fail.
  Authorization Issues: The user may not have the necessary authorizations to perform proxy generation.
  System Errors: Temporary system issues or inconsistencies in the SAP system can also lead to this error.
  
  Solutions:
  
  Check Logs: Review the detailed logs for the specific errors that occurred during proxy generation. You can find these logs in the Integration Builder or the transaction code SXMB_MONI for monitoring.
  Validate WSDL/XSD: Ensure that the WSDL and XSD files are valid and do not contain any syntax errors. You can use online validators or tools to check the correctness of these files.
  Review Configuration: Double-check the configuration settings in the Integration Builder, including the service interface and the communication channel settings.
  Check Authorizations: Ensure that the user performing the proxy generation has the necessary authorizations to access the required objects and perform the operation.
  Re-generate Proxies: If the issue persists, try to delete the existing proxy and re-generate it from scratch.
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address known issues related to proxy generation.
  
  Related Information:
  
  Transaction Codes: Use transaction codes like SPROXY to access the Proxy Object Builder and SXMB_MONI for monitoring messages.
  SAP Documentation: Refer to the official SAP documentation for detailed guidance on proxy generation and troubleshooting.
  Community Forums: Engage with SAP community forums or SAP support for additional insights and solutions from other users who may have encountered similar issues.
  
  If the problem persists after trying the above solutions, consider reaching out to SAP support for further assistance.