How To Fix SPRX037 - WSDL error: Interface contains inbound AND outbound methods

SAP Error Message - Details

• Message type: E = Error

• Message class: SPRX - Proxy Generation

• Message number: 037

• Message text: WSDL error: Interface contains inbound AND outbound methods

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SPRX037 - WSDL error: Interface contains inbound AND outbound methods ?

  The SAP error message SPRX037 indicates that there is an issue with the Web Service Definition Language (WSDL) file generated for a service interface in SAP. Specifically, the error states that the interface contains both inbound and outbound methods, which is not allowed in certain contexts.
  Cause:
  The primary cause of this error is that the service interface defined in SAP has methods that are intended for both inbound (request) and outbound (response) communication. In the context of WSDL generation, this can lead to ambiguity because WSDL is typically designed to describe either a one-way service (inbound) or a request-response service (outbound), but not both in the same interface.
  Solution:
  To resolve the SPRX037 error, you can take the following steps:
  
  
  Review the Interface Definition:
  
  Check the service interface in SAP to identify the methods defined. Ensure that the interface is either purely inbound or purely outbound.
  If the interface is intended to handle both types of methods, consider splitting it into two separate interfaces: one for inbound methods and another for outbound methods.
  
  
  
  Modify the Interface:
  
  If you find that the interface has both inbound and outbound methods, you will need to refactor the interface. Create two distinct interfaces:
  
  One interface for inbound methods (e.g., methods that receive requests).
  Another interface for outbound methods (e.g., methods that send responses).
  
  
  
  
  
  Regenerate the WSDL:
  
  After modifying the interface, regenerate the WSDL file to ensure that it reflects the changes made. This can typically be done through the SAP transaction code related to the service definition (e.g., SOAMANAGER).
  
  
  
  Test the Web Service:
  
  Once the WSDL is regenerated, test the web service to ensure that it functions correctly without the SPRX037 error.
  
  
  
  Related Information:
  
  WSDL: Web Service Definition Language is an XML-based language used to describe the functionality offered by a web service.
  Inbound and Outbound Methods: In the context of web services, inbound methods are those that accept requests from clients, while outbound methods are those that send responses or notifications to clients.
  SAP SOAMANAGER: This is the transaction in SAP used for managing web services, including the configuration and generation of WSDL files.
  
  By following these steps, you should be able to resolve the SPRX037 error and successfully generate a valid WSDL for your service interface.