Resolve Workflow Error: Symbol property has already been set on Sequence

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When working in the Workflow Designer, users may encounter the message "Workflow Designer encountered problems with your document" accompanied by the following error code:

'Symbol' property has already been set on 'Sequence'.

 


 

So, why does this happen?

This error is casued by a known bug in the .NET 4.5 Framework. The error may appear on the local machine of an individual creating a workflow. It can affect JAMS 6.4.X users with any .NET Framework older than .NET 4.6.

 


 

To resolve the error message, install .NET 4.6 or newer on the local machine encountering the error:

Download .NET 4.6 or newer by visiting the Microsoft .Net Downloads Page and selecting the appropriate .NET version, 4.6 or higher. Follow the installation instructions given by Microsoft.

 

 

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