We are building a new corporate image and ran into this error as well.
For us, we had to mount the .wim files on something other than the current system volume - we tried to mount to C:\[imagepath]\mount and it gave a whole slew of "objectID in use" errors.
They guy training me quickly remembered and had us unmount then re-mount on another volume (in this case an external USB 3.0 drive) and it remounted without error.
[ WARN ] An objectID is in use on this volume
in Unattended Windows 7/Server 2008R2
Posted
We are building a new corporate image and ran into this error as well.
For us, we had to mount the .wim files on something other than the current system volume - we tried to mount to C:\[imagepath]\mount and it gave a whole slew of "objectID in use" errors.
They guy training me quickly remembered and had us unmount then re-mount on another volume (in this case an external USB 3.0 drive) and it remounted without error.