How To Fix SIW371 - Error while fetching proxy data; message type &1 not found

SAP Error Message - Details

• Message type: E = Error

• Message class: SIW - Service Implementation Workbench

• Message number: 371

• Message text: Error while fetching proxy data; message type &1 not found

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SIW371 - Error while fetching proxy data; message type &1 not found ?

  The SAP error message SIW371 indicates that there is an issue with fetching proxy data, specifically that the message type specified (denoted as &1 in the error message) cannot be found. This error typically occurs in the context of SAP Process Integration (PI) or SAP Process Orchestration (PO) when dealing with message mappings or service interfaces.
  Causes:
  
  Missing Message Type: The specified message type is not defined in the system. This could be due to a configuration issue or an oversight during the setup of the integration scenario.
  Incorrect Configuration: The configuration of the sender or receiver system may not be set up correctly, leading to the system being unable to locate the required message type.
  Transport Issues: If the message type was recently transported from a development environment to a production environment, it may not have been included in the transport request.
  Namespace Issues: The message type may exist but is not in the expected namespace, leading to a mismatch.
  Versioning Issues: There may be versioning issues where the expected version of the message type is not available.
  
  Solutions:
  
  Check Message Type Definition: Verify that the message type specified in the error message exists in the system. You can do this by navigating to the relevant transaction (e.g., WE81 for IDoc message types or SXMB_MONI for monitoring).
  Review Configuration: Ensure that the configuration for the sender and receiver systems is correct. Check the integration scenario and ensure that all necessary components are properly configured.
  Transport Check: If the message type was recently transported, check the transport logs to ensure that it was included in the transport request and successfully imported into the target system.
  Namespace Verification: Confirm that the message type is in the correct namespace. If there are multiple namespaces, ensure that the correct one is being referenced.
  Check for Versioning: If applicable, ensure that the correct version of the message type is being used in the mapping or configuration.
  Recreate the Message Type: If the message type is missing and cannot be found, you may need to recreate it in the system.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SXMB_MONI (for monitoring), WE81 (for IDoc message types), and SPRO (for configuration).
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP Notes can provide additional context or solutions.
  Documentation: Review SAP documentation related to Process Integration and message types for best practices and troubleshooting steps.
  
  If the issue persists after following these steps, consider reaching out to your SAP Basis or PI/PO support team for further assistance.