Mac OS 10.4.10 Dual 2 Ghz Power PC G5 Power down...

Hi,

Just curious if anyone has experienced their computer shutting down - complete power down - when using C1 Pro 3.7 on a Mac OS 10.4.10 Dual 2 Ghz Power PC G5?

I try to process out a file, and it just shuts down.

Any comments would be greatly appreciated.

Per