I've had a similar problem some days ago:
The SW repository is stored to an iSCSI drive, which is connected
to the DTC server.
Something (?) prevented the iSCSI drive from booting uü correctly
after a restart of DTC system, so the repository was not accessible...
Did you check the connection to the repository?
Did you also check the privileges on the repo share and filesystem?
If you install SW as "system user" (default) you need to
give read-access to *everybody*..
Also try to change the "install as" from "system
user" to i.e. domain admin and deploy again - any changes?
Greets,
Stefan