Problems launching Canvas 3.5.5


Suddenly all three macs I have (including a 7300 which only uses Mac OS9 and two more recent computers that run both OS X and 9) have started to show a problem when I try to launch Canvas 3.5.5.

I get: Problem: Time Expired
Probable Causa/ solution: (blank)
Info/ Location Code: 203/0

Has anyone experienced this same problem, and does anyone know how to fix it?