How to shell this at 1.8mm on the OUTSIDE?

Hey all, I am using Inventor 14pro and need to shell this body 1.8mm on the OUTSIDE. It gives me an error message about a vertex being too small. Making the shell thin (down to .05mm) does not fix the problem. Making smartphone cases, so the geometry is needed to project out from this body. Thoughts?

Cheers, C

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1 Answer

Hi Chris,
a workaround (Split into two bodies) did it. See file.

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