Compare two components fails.

[Bertho_Boman]

Evaluating two similar components, not two different versions in Fusion, to verify that an externally supplied CAD model matches my model, is critical for many applications.

When using the "Compare" command I get an error message: 

"There was a problem combining geometry together.
If attempting a Join/Cut/Intersect, try to ensure that the bodies have a clear overlap (problems can occur where faces and edges are nearly coincident)."

Ideally there should be no or minor differences the components  but then Fusion does not work!

Ideally, there ought to be a "Difference" command.

There is a detailed thread posted by me: "Compare two independent bodies , not two versions of the same part?"

By the way, I am surprised that there is not an ID# for forum messages to make it easy to reference and search.

Bertho

[davebYYPCU]

I think you mean Combine

if reporting a bug, you will be asked for the data that exhibits the problem.

You can use a linking routine to point to the other thread.

[jeff_strater]

I'm not familiar with the "Compare" command.  Can you share some more information?  Are you using "Combine"?  We would need the data to be certain, but it is a known limitation for Combine that models without clear overlap can generate failures in this command, as the error message indicates.

Also:  "Ideally, there ought to be a "Difference" command."  This is the Interference command under the Analysis menu.

[Bertho_Boman]

I fixed the title. 🙂

Is this what you mean by a link?

 https://forums.autodesk.com/t5/fusion-360-design-validate/compare-two-independent-bodies-not-two-ver... 

[Bertho_Boman]

Yes, it was not clear what I wrote, sorry. 

The interference function is difficult to use on complex parts.

What is really need is an option to clearly show any differences between the two components (bodies)

The result John Hackney got shows quickly and clearly what changed.

Ideally, the output differences ought to be color coded if the second component is bigger or smaller than the first reference one.

There is a link in the previous message that includes the two files. 

[hamid.sh.]

I don't think Combine command has problem, at least not in this case. The geometry had a problem that prevented combine. I replied to your other post. Please check.

[Bertho_Boman]

Is not the error message and warning implying to not combine nearly identical part?

Why should the combine/cut  function not be able subtract part-A from an identical part-B and the result would be zero = equal parts?  From reading the same procedure for Solid Works it functions properly.

[hamid.sh. · Accepted solution]

Fusion's Combine do function properly and is able to subtract identical parts to get zero. I mean I already did it for your files, after I eliminated problematic edges. You were receiving error because in the area I pointed in the other post you were not feeding identical but nearly identical faces to it. So error was also correct. And after resolving the problem Combine did subtract identical faces to get zero as you can see in the file.