"Failed to open file" Error

Good morning all,

I assume some of y'all have run into this before, but I did a quicksearch and didn't find anything.

I've got an assembly with a few parts in it so far, and I'm tryingto insert another instance of a part that's already used in theassembly. However, I keep getting the "failed to open file" error.Usually when this happens I can get around it by doing a Save All,then closing SolidWorks and restarting. This time it hasn't worked,and I even tried rebooting my computer (which has worked in thepast as well) but no luck.

Anybody found a way to deal with this? I'm running SW2008/SP3.1...

Thanks,
PerrySolidworksAssemblies