Hi
Question: 3.0, 3.1, 3.5, 3.9 ?
What have you done since yesterday. i.e. after you had the problem.
Have you got DOpus on the machine.
You say your computer boots fine.... Well then the Libs: is in the correct location.
Have you recently installed anything else.
Have you checked all your drawers in your Workbench folder and have you created any in the last two days.
Interrogate your Libs: drawer and see what is in there using DOpus. Also check your user-startup in S . Didn`t really understand why you say Libs: is in SYS:device... You mean SYS: or Workbench I assume
What installer do you have on the computer and which installer did the apps you intsalled use..
I think this is about installing stuff. You think you are installing to the main Libs drawer but you are actually installing to software Libs drawer. Or vesa visa. You probably need to assign your software to find the Libs drawer in Sys: Just a thought. As someone said use SnoopDOS that will tell you where the path for Libs is. I guess they are two different locations.... Did you install or did you copy the software.
All the best
scuzz
http://www.commodore-amiga-retro.com