ID 364337 - Scene freezes viewport and presents GL redraw error unless meshfusion item is deleted.

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Problem summary
Scene freezes viewport and presents GL redraw error unless meshfusion item is deleted. 

Customer reported version
modo.12.1v1

Customer reported platform

Steps to reproduce
1) Open Modo.
2) Select File>open and open the attached scene.
Result: The Viewport should turn yellow and present an error. If not, switch layouts and then switch back to the model tab.

Workaround
Delete the meshfusion item.

Reproduced by support
This bug has been reproduced in:
12.1v2 - Windows 10, OSX 10.13.5
12.1v1 - Windows 10, OSX 10.13.5

Unable to reproduce bug in:
12.0v1 - Windows 10, OSX 10.13.5
11.2v3 - Windows 10, OSX 10.13.5

Earliest version tested
12.0v1 - Windows 10, OSX 10.13.5 - This issue no longer appears in this version and has regressed. The viewport flashes yellow, but recovers and can be interacted with.

Expected behaviour
The viewport should not encounter an error due to specific meshfusion items.

Actual behaviour
The viewport encounters a redraw error when opening this meshfusion scene.
 

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