Node Error After Saving, Closing, and Re-Opening a Script

[coverholt]

If this issue is not a bug report or improvement request, please check the Dynamo forum, and start a thread there to discuss your issue.

Dynamo version

2.0.2

Revit version

2018 and 2019

Operating system

Windows 10

What did you do?

Added different nodes, such as 'All Elements of Model Category' and 'Links'... Saved the file... re-opened the file later.

What did you expect to see?

One output connection from the nodes.

What did you see instead?

An added output connection for each time the file is opened.

[QilongTang]

@mjkkirschner @alfarok I remember our team has seen similar issue to happen because of NewtonSoft.Json conflict? Because this seems like a deserialization failure to me

[alfarok]

@QilongTang Yeah, I usually encounter this when a NodeModel derived node is missing a Json constructor.

[mjkkirschner]

or if something else has loaded an incompatible version of json.net - please search the forum or issues for this same issue and reopen if you cannot make progress after reviewing those threads.

[mjkkirschner]

https://forum.dynamobim.com/t/dynamo-2-0-duplicates-ports-of-custom-node-when-file-is-saved-and-reopened/20867/4

[MarcSp74]

thanks for the link, but I really don't know what to do.
Seems a lot of people had this issue posted, but a clear and simple answer how to fix I cannot find.
the only thing I can imagine and tried is reinstalling the package, but that doesn't help.
Should I uninstall en reinstall Revit and Dynamo and al of its components? Does that help? I prefer not as you hopefully can understand.

[mjkkirschner]

@MarcSp74 something else has loaded an incompatible version of newtonsoft.json.net - it's likely some addin you have installed in Revit.