Welcome Would be nice to see this in the FAQ ... or better: if a VM could not be compressed, there should be a hint pointing to the image tool. Thank you very much, Harald
Still not solved Hi, it seems that the solutions discussed so far can not be applied to my case. Just a few minutes ago I have deleted the second disc and created a new one from scratch. Just after "activate" (initialize, partition and format it) in the virtual Windows XP machine as drive "D:" the same "error" returns. However, it is a little bit "inconvenient" to perform a compress by re-creating the whole disk and restore the content from backup ... copying some ten GB over network :-( And yes, I have checked the Imaging tools and they report no snapshot at all. So there is nothing to merge, with the check-box greyed out. My current build is 5-0-9376 ... which seems to be most recent one. I can only assume that Parallels has a very basic problem with additional disks. The first (or system) disks of the same virtual machine can be compressed without problems at any time, by the way. kind regards