Catalyst 3.0

[Exegete <millers@noneofyourbusiness.com>]

Well, here's a stumper, for me at least.

I booted Catalyst just fine on my Transwarp equipped //e with a 3.5" 
UniDisk. However, when trying to boot on a stock //gs with an Apple 3.5" 
diskdrive, and with the internal 3.5" drive of my //c+, I get the ProDOS 
splash screen, the Catalyst copyright notice, and then an error message 
saying that the machine can't read the Catalyst disk!

I gather that this version of Catalyst was for use with the 3.5" 
UniDisk, in fact, several places in the documentation you find a 
suggested retail price when purchaised with a 3.5" UniDisk. But it can't 
be read on the standard 3.5" disk?

Any help? Or at least an explanation?

Roy