How To Fix SWF_HTTP108 - Complex types are not supported (element reference '&1')

SAP Error Message - Details

• Message type: E = Error

• Message class: SWF_HTTP - Web Services in the Workflow: Server Functions

• Message number: 108

• Message text: Complex types are not supported (element reference '&1')

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SWF_HTTP108 - Complex types are not supported (element reference '&1') ?

  The SAP error message SWF_HTTP108, which states "Complex types are not supported (element reference '&1')", typically occurs in the context of SAP Workflow or when dealing with web services. This error indicates that the system encountered a complex data type that it cannot process or serialize properly.
  Cause:
  
  
  Complex Data Types: The error arises when the workflow or web service is trying to handle a complex data type (like structures or tables) that is not supported in the context where it is being used. This can happen when:
  
  You are trying to pass a complex type as a parameter in a web service call.
  The workflow is trying to use a complex type in a context that only supports simple types (like strings or integers).
  
  
  
  Mapping Issues: If there is a mapping between different data types (for example, between an SAP structure and an external web service), and the mapping is not correctly defined, it can lead to this error.
  
  
  Version Compatibility: Sometimes, the version of the SAP system or the web service being called may not support certain complex types.
  
  
  Solution:
  
  
  Check Data Types: Review the data types being used in the workflow or web service. Ensure that you are not trying to pass complex types where only simple types are expected.
  
  
  Modify Workflow: If you are using a workflow, consider modifying it to use simple types or break down complex types into simpler components that can be processed individually.
  
  
  Adjust Web Service Interface: If you are working with a web service, check the service interface and ensure that it is designed to accept the data types you are trying to send. You may need to adjust the service definition or the way you are calling it.
  
  
  Use Serialization: If you need to send complex data, consider serializing the complex type into a string format (like JSON or XML) that can be easily transmitted and then deserialized on the receiving end.
  
  
  Consult Documentation: Refer to the SAP documentation for the specific version you are using to understand the limitations regarding complex types in workflows or web services.
  
  
  Debugging: Use debugging tools to trace the workflow or web service call to identify exactly where the error is occurring. This can help pinpoint the complex type that is causing the issue.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its knowledge base with solutions for common problems.
  Community Forums: Engage with SAP community forums or support channels where other users may have encountered and resolved similar issues.
  SAP Help Portal: Utilize the SAP Help Portal for detailed documentation on workflows and web services, including data type handling.
  
  By following these steps, you should be able to identify the root cause of the SWF_HTTP108 error and implement a suitable solution.