Opening a 20.6 C# file within a REF project with 20.8 gives me "Unregistered Expression Editor" everywhere

I opened a Robotic Enterprise Framework project in 20.8 that I created with 20.6, and found that I can’t do anything with fieldsand variables, since everywhere there’s the message “Unregistered Expression Editor”.

I opened the .xaml files, and there’s tons of references to C# and some Microsoft package, so as a quick fix I can’t just edit the files to switch to


Hi @P_Botrel

It looks like you opened a C# file directly in the project, which is not supported.

Is that correct?

Yes. I didn’t know it was not supported, since it worked in 20.6

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