Our folder hierarchy is quite allright, somebody from our autodesk dealer confirmed that when he was at our compagny, so (unfortunately) that is not yet the solution for our problem.
I am also having random modeling errors with welds. All of my welds were working just fine, then one day most of them started giving modeling errors. Funney thing is that i haven't made any changes to my part.
Via an other way i got news concerning this problem, at least my problem, yours sounds the same. Autodesk atmitted there is a bug, and is working on a fix..
The question is how could they not spot this problem before release? I noticed it within a short time of using Inventor 2011. The weld shape displays ok in the preview but it does not let it become a weld. Once again, Autodesk cannot get the simple things right.
Same problem here. Just two plates welded together perpendicularly, fillet weld shows preview correctly, pressing Apply or OK results in error message. Closed the assembly and Inventor, restarted Inventor, opened the assembly and tried the same fillet weld --> no problem....
trouble is you could do a bunch of welds, make some change that means a weld update, and they will all disappear into errorworld. when will this be fixed? is this commercial software or an opensource project?
The solution is you pay to get 2012 to fix the broken software. It's like buying a car that doesn't have working brakes but instead of fixing the brakes you have to buy a new car. The new car has brakes that work but the steering wheel is now square instead of round, it has better cornering but lower mpg. And the satnav still tries to drive you off a cliff.
Start with some of our most frequented solutions to get help installing your software.