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

SPRX037 - Overview

• 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

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.

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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