Separate names with a comma.
I just got the exact same message.
Is there any official response from Parallels regarding this issue?
I ended up having to re-install v2.5 and resize a backup of the hdd (as it couldn't read the v3.0 format) - did the gParted trick as described...
Same problem, I've wasted the whole morning looking for this, not happy...
The support site says the Parallels Image Tool should be in the Applications/ Parallels folder but it's not there! Everything else seems to be...