so I get this message a lot why its not a 3d sketch how do I stop this
you can clearly see its a surface and not a 3d sketch
If you run the "measure" command on both surfaces, what do you get?
I rarely work with Surfaces, but there are others here that use them often. I suspect they might need to see the Part file in order to help. Can you post it here? If you edit your original post there should be a link to attach files, or click on the black text "Use advanced editor" at top right of a Reply box to get the Attach link.
Here is the part
I see a couple of little hiccups (I am not sure if these are the culprit or not):
Also, the bottom of the piece isn't totally flat (not sure if it needs to be, though):
Measuring from the top plane:
So after turning my computer off and on 4 times after trying this it just worked
Retrieving data ...