Amiga 3000 / Error 8000000B

[matthey]

Well, I do have a 68882 in this so I think that covers the FPU doesn't it?

It's a line F trap/guru. I can think of 3 possibilities:

1) buggy program or library (may be a MUI add-on library)
2) an fpu program or library for the 68040 or 68060 was accidentally installed and it's trying to use the FSOP or FDOP instructions
3) a program or library for the 68040 or 68060 was accidentally installed and it's trying to use the MMU or MOVE16 instructions

If it only happens when running MUI then it may be an MUI add-on library. You can either try installing new versions that may fix it or reinstall MUI and then the add-ons one by one to see if the problem returns.

[matthey]

Interesting, I do see a 68040.library in libs that came from the 3.1 install but other than that, nothing jumps out.

The 68040.library won't be used with a 68030. SetPatch detects the CPU on boot and uses it only if a 68040 is detected. It shouldn't be a problem at all. It's a lot more rare to install a 68040 or 68060 program or library than for someone without an FPU to install a program or library that uses the FPU. Almost all non-FPU 68040 or 68060 libraries and programs will work on the 68030. Some that use the FPU will also work depending on which compiler is used.

It's more likely that you have some other corrupted files for some reason. If you have one then you could have others. The big question is what would be causing the corruption.