I am trying to repair a DB in a suspect state after exporting a VM server.

I have backups from the other day but I would rather use the live one.

It is not a production system.

What is this error on DBCC checker running?

Msg 596, Level 21, State 1, Line 0
Cannot continue the execution because the session is in the kill state.
Msg 0, Level 20, State 0, Line 0
A severe error occurred on the current command.  The results, if any, should be discarded.

I had to put the DB in single user mode:

ALTER DATABASE [DB Name]  SET SINGLE_USER WITH ROLLBACK IMMEDIATE
GO

run the checker with:

DBCC CHECKDB (B[DB Name] REPAIR_ALLOW_DATA_LOSS)
GO

Then run the checker again:

DBCC CHECKDB
GO

Then put it back in multi user mode:

ALTER DATABASE [DB Name] SET MULTI_USER
GO

After that it seemed to be OK

Just as a sidenote - this was from running Disk2VHD on an SQL server with transaction shipping installed which is what caused the issue.

I also had to restore the master and msdb DBs to get it working and restore file permissions to the DB files afterwards.