Hey, I got this error, too. I tried this: Replaced the diskpart.exe from SP1 with the one without SP Didn't replaced the format.com from the SP1 Added the "vssapi.dll" file from a installed Win2k3 Server with Sp1 in the system32 dir [Edit] If you don't want to copy the "vssapi.dll" manualy you can add these two lines in the "custom.inf" file: [SourceDisksFiles] vssapi.dll=2 Bart PE would copy the file now automatically And now I'm able to format the partitions I created with diskpart. But this doesn't work under VmWare 5.0.0 build-13124! maybe on prior versions or a version that's coming out in the future. Fabs
