Have you tryed the patch in Piru' Exec44 archive for SysInfo?
SysInfo 3.23
------------
SysInfo MFlops test access memory memory below 0x4000. This will barf with
exec44 + CyberGuard since this memory is marked invalid. Patch provided
fixes this.
Version information:
SysInfo 3.23 (1993-07-18)
(18-Jul-93)