Check the version of the roms on the GVP HC+8. You may need to upgrade to a newer version.
Also remove all 16-bit fast ram from the system and "See what happens"
The F-40 is particularly subborn about the hard drive controllers it will work with and some fast ram controllers
TjLaZer is right the V3.4 should have help a bit. (thanks TjLaZer for helping with my roms :-D)
One more thing. Check the configuration of the RAM in the F-40. The F-40's memory lines are dual channel and require the ram to be in certain SIMM slots to work properly (aka 32-bit ram error). I think The Big Book of Amiga Hardware or the Amiga hardware Database will tell you which slots to use.
