Installing Bvision?

[Piru]

Old CGX doesn't work with exec version number > 40.

There is a patcher program included in exec44 archive called cgx44fixer.

Some software explicitly check for V40 and think V44 is *older* than
   V40. Luckily such broken software is very rare. These programs include
   CyberGraphX software (only upto cgxv42_r2_pre8). Here is how you can fix
   it:

     > cd libs:
     > copy clone cgxsystem.library cgxsystem.library.backup
     > cgx44fixer cgxsystem.library
     cgx44fixer by Harry "Piru" Sintonen
     patch 0: offset: 0x0243E0
     patch 1: offset: 0x025C86
     cgxsystem.library patched succesfully.

     (Note: offsets vary with different cgxsystem.library versions!)

   If there should be any problems with the patched cgxsystem.library just
   restore the backup. Without this patch the displayinfo database is
   wrong and you can't see any CGFX modes in screenmode requesters.

   UPDATE: The latest pre-release of CGX V4.2 (cgxv42_r2_pre11) finally
   fixes this problem, and thus you no longer need this patch. Hooray! :-)

V45 (3.9) exec has the same issue.

[Piru]

@Karlos

Ah cool, then it should work with OS 3.9 assuming you use cgx44fixer.

[Piru]

@Karlos

You're missing the fact that it was fixed for CGX4 in cgxv42_r2_pre11. This and later versions don't have any problem with exec version > 40.

Another option is that you don't have a replacement exec enabled in your OS 3.9 setup.