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

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 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