I was just passing through on my way somewhere else,
and saw this.
Hope I'm not to late to help.
From Adobe Online Help:
"When your system does not have enough RAM to perform an operation,
Photoshop and ImageReady use a proprietary virtual memory technology,
also called scratch disks.
A scratch disk is any drive or a partition of a drive with free memory.
By default, Photoshop and ImageReady use the hard drive
that the operating system is installed on as its primary scratch disk."
To correct this error:
Scratch Disk is Full
(This is a question on the ACE exam)
Brought to you by your friendly
Se ya later...