How To Fix SPXN156 - WSDL invald. Cmmunication type '&1' not supported

SAP Error Message - Details

• Message type: E = Error

• Message class: SPXN - Proxy Generation

• Message number: 156

• Message text: WSDL invald. Cmmunication type '&1' not supported

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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message SPXN156 - WSDL invald. Cmmunication type '&1' not supported ?

  The SAP error message SPXN156 indicates that there is an issue with the Web Service Description Language (WSDL) file being used in your SAP system. The specific message states that the communication type specified in the WSDL is not supported. Here’s a breakdown of the cause, potential solutions, and related information:
  Cause:
  
  Unsupported Communication Type: The WSDL file may specify a communication type that is not supported by the SAP system. Common communication types include HTTP, SOAP, and REST, and if the WSDL specifies a type that is not configured or recognized, this error can occur.
  Incorrect WSDL Configuration: The WSDL might be incorrectly configured or generated, leading to invalid entries that the SAP system cannot process.
  Version Mismatch: There may be a version mismatch between the WSDL and the SAP system, where the WSDL is using features or specifications that are not compatible with the version of SAP you are using.
  Network Issues: Sometimes, network issues can lead to problems in accessing the WSDL, causing the system to misinterpret the communication type.
  
  Solutions:
  
  Check WSDL Configuration: Review the WSDL file to ensure that the communication type specified is supported by your SAP system. You may need to modify the WSDL to use a supported type.
  Regenerate WSDL: If the WSDL was generated from a service definition, try regenerating it to ensure it is up to date and correctly configured.
  Update SAP System: Ensure that your SAP system is updated to the latest version that supports the required communication types. Check SAP notes for any relevant updates or patches.
  Test Connectivity: Verify that there are no network issues preventing the SAP system from accessing the WSDL. You can use tools like ping or curl to test connectivity to the WSDL URL.
  Consult Documentation: Refer to SAP documentation for the specific version you are using to understand the supported communication types and any configuration steps that may be necessary.
  Contact SAP Support: If the issue persists, consider reaching out to SAP support for assistance, especially if you suspect a bug or a deeper configuration issue.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues related to WSDL and communication types. SAP frequently updates their knowledge base with solutions to common problems.
  Web Service Configuration: Review the configuration settings for web services in your SAP system, including transaction codes like SOAMANAGER, to ensure everything is set up correctly.
  Testing Tools: Use tools like SOAP UI or Postman to test the WSDL and the web service independently of SAP to ensure that the WSDL is functioning as expected.
  
  By following these steps, you should be able to identify and resolve the issue related to the SPXN156 error message in your SAP system.