[Dune] Gridcheck asks for geometry.local() outside the element?

[Aleksejs Fomins]

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Dear Dune,

I am now trying to make the gridcheck run with curvilinear grid.

It seems that at some point gridcheck calls the geometry.local() method for one of tetrahedra in the provided mesh. And it calls the method with a global coordinate that is clearly outside the element. I previously assumed this was an illegal action, so I throw an error there...

Questions:
1) Is this expected behaviour of gridcheck?
2) If yes, what is the expected return value?
3) If no, then the problem is elsewhere. To search for it, I need debug output. Does gridcheck have debug output and if yes how to switch it on?

Thanks,
Aleksejs
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