Solution for Adobe Photoshop won't launch and gives error message, on Mac OS X Tiger systems.

Could not complete your request because of a program error!

Why do I keep getting this error when I try to launch Adobe Photoshop CS3

This could be happening as a result of a corrupt Photoshop CS preference file. If you are using OS X Tiger 10.4 on an Intel Mac then you could try holding down the Apple + Option + Shift keys as you start up Photoshop. This will provide a message which will allow you to delete the Photoshop settings file and may well solve the problem.

If not, then the error may be down to a system software problem, or even a hard disk problem. Adobe has a page devoted to this error which may help.