V38 constant crash error - The calling thread cannot access

Anyone else getting this error? We’ve installed 7 seats of v38 on 3 different PC configurations, they all get it, all day, randomly. Losing hours and hours every day.

“The calling thread cannot access this object because a different thread owns it”
Screenshot 2026-04-02 132635

What’s the fix here? It makes the software borderline un-usable.

Thanks,

Nathan

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I get it daily, especially when I close the application.

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Get it all the time.

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I find if you see the error message after you’ve closed, any changes you’ve made in your geometry or CAM tree may not be there when you re-open the BobCAD file. It’s a good indicator something isn’t how you thought you left it.

We tend to find a few extra operations in the CAM tree with no geometry selected and no toolpaths computed.

Yikes. I haven’t noticed that yet, but I’ll keep my eye on it. And maybe I could be a convenient excuse (that’s a joke of course).