How To Fix SPRX120 - Canceled: Interfaces must have the same direction in all methods

SAP Error Message - Details

• Message type: E = Error

• Message class: SPRX - Proxy Generation

• Message number: 120

• Message text: Canceled: Interfaces must have the same direction in all methods

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SPRX120 - Canceled: Interfaces must have the same direction in all methods ?

  The SAP error message SPRX120 indicates that there is a mismatch in the direction of interfaces across different methods in a service interface. This typically occurs in the context of SAP Process Orchestration (PO) or SAP Integration Suite, where service interfaces are defined for communication between different systems or components.
  Cause:
  The error arises when:
  
  You have defined multiple methods in a service interface, and the direction (input/output) of the interface parameters is inconsistent across these methods.
  For example, if one method has an input parameter defined as "In" and another method has the same parameter defined as "Out," this inconsistency will trigger the error.
  
  Solution:
  To resolve the SPRX120 error, you should ensure that all methods in the service interface have consistent parameter directions. Here are the steps to do this:
  
  
  Review the Service Interface: Open the service interface in the SAP development environment (e.g., SAP NetWeaver Developer Studio or SAP Business Application Studio).
  
  
  Check Method Definitions: Look at each method defined in the service interface and examine the parameters. Ensure that the direction (In, Out, InOut) of each parameter is the same across all methods.
  
  
  Modify Inconsistent Parameters: If you find any parameters with inconsistent directions, modify them to ensure uniformity. For example, if one method has a parameter as "In" and another has it as "Out," decide on a single direction that makes sense for your use case and update all methods accordingly.
  
  
  Save and Activate: After making the necessary changes, save the service interface and activate it.
  
  
  Test the Changes: Once activated, test the service interface to ensure that the error is resolved and that the interface behaves as expected.
  
  
  Related Information:
  
  Documentation: Refer to the SAP documentation for service interfaces and method definitions for best practices and guidelines.
  SAP Community: Engage with the SAP Community forums for discussions and solutions related to similar issues.
  Version Control: If you are working in a team, ensure that version control practices are in place to avoid conflicts in interface definitions.
  
  By following these steps, you should be able to resolve the SPRX120 error and ensure that your service interface is correctly defined.