Assemblies not rebuilding properly

joshua_foxworth

OK, so I have a reproducible problem. I have built an assembly and there are no errors. Then, either the session expires and I have to reload the page or I leave and come back or whatever - something happens that causes the page to be reloaded. When this happens, the assembly which was previously working is now over defined and there are errors with the mates. 

I cannot see how the system is over defined and I cannot understand why it works until it is reloaded.

https://cad.onshape.com/documents/97434099131350e534d87e91/w/f983dd69e4287aef89e7ff21/e/f5129967f8d66322d1536a7f

(DAS Truss)

P.S. I have asked earlier questions and gotten good feedback on how the better model the truss. I am asking about why the system loads differently than it was originally modeled and why the system is over defined, not about ways to remodel the system.

NeilCooke

It's because the thread on your eyebolt is not cylindrical so the mates are fighting each other

NeilCooke

Works fine on a copy after reloading page (which is reloading the whole doc). Could it be something to do with your API? 

joshua_foxworth

It works now because I have suppressed a couple of the mates. However, the bottom end of one of the struts is left unconnected to the bottom ring. It just looks connected because I moved it there.

NeilCooke

It's because the thread on your eyebolt is not cylindrical so the mates are fighting each other

joshua_foxworth

Wow. Can't believe that I missed that. Must have been something going on in the math that I missed. Appreciate it.

joshua_foxworth

Incidentally, the bolt problem ended up being the result of a rounding issue in onshape.