More Tool Issues

I previously had a lua virus. After completely wiping my garrysmod files, I redownloaded a few major addons, such as phx, wiremod, lifesupport, spacebuild, etc. I was just getting back into things, and it was working fine. Now my weld tool decided it doesn’t wish to work.

When I attempt to weld, I get this:

weapons\gmod_tool\stool.lua:92: attempt to index a nil value

Another virus? Or something fixable?

Thanks in advance.