Need help with a missing face on a solid

I’m trying to learn Rhino, and cannot figure out how to resolve this.
I did a chamfer on an edge and am left with a missing face (highlighted in red). I’ve been messing with this for a while now and can’t figure out the proper way to fix this. Any help would be greatly appreciated.
Thank you!

It’s easier to help if you post a file. That part of the model which is failing on you is good enough.

// Rolf

Hi Rolf,
Thank you for taking a look at this!
Test.3dm (2.8 MB)

I think this tiny chamfer made the problem :

you can extend the surfaces and split them with each other:

Thanks for taking a look. I didn’t even see that…
I’ll give this a try.

also you can configure the shaded view to always show you the naked edges and backfaces of the surfaces as you saw in the pictures, this helps a lot to detect errors while modeling.

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