FATAL ERROR Unhandled Access

Hi,
Issue when I export Pipe network from civil 3D to NWC it come this massage below Unhandled Access…any one have any answer how to fix this issue?

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A month ago I received the regular update of Widows 10 and now such errors appear regularly.

Is this in Dynamo or in Civil 3D via the user interface?

If in Civil 3D via the UI, best to ask on the Civil 3d forums or submit a ticket to support via manage.Autodesk.com.

If in Dynamo, is it with an out of the box node, package, or custom Python? Is it with any DWG or only particular ones? For any of those options best to post the graph in any case for review.

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