Attempting to combine 2 bodies

[tom-9000]

I’m attempting to combine Drop + Arm.

I get this 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).

Failed to Boolean bodies together

I don’t know what I’m doing wrong? Does anyone know how to fix this problem?

Thanks in advance

Ray