Re: My sim won't use the fabricator
Do you have enough bits and pieces to make anything? You can check by mousing over the fabricator, mousing over the recycling machine or mousing over the household money at the bottom left of the screen. It if shows zero or low numbers for either, then you need to recycle some stuff using the recycling machine to get them. You can get bits and pieces in other ways. Try dumpster diving and rummaging in trash cans.
If you do have bits and pieces, then the items you can make will not be greyed out in the selection panel. If all the items are greyed out, again, not enough bits and pieces. If you do have bits and pieces and the items are not greyed out in the selection panel, then something else is going on. If you are using mods and CC, then test by trying to use the machine in a vanilla game, without your mods and CC. If it works then, you'll know it is something in your mods folder causing the problem. You'll have to do a bunch of testing until you find the problem file and remove it.
Hope this helps.