SQL Server 2008 :: Unable To Shrink Transaction Log - Could Not Locate Files

I am trying to reorganise the log files on a server, (long story short they are fragmented so I want to shrink and reset the initial size and growth) and I am unable to shrink them. When I run the following:

use test
DBCC SHRINKFILE(test_log, TRUNCATEONLY)
--or
use
DBCC SHRINKFILE(test_log,2, TRUNCATEONLY)

I get the following message:

Msg 8985, Level 16, State 1, Line 1

Could not locate file 'test_log' for database 'test' in sys.database_files. The file either does not exist, or was dropped.

I get this message for every database on the server. I got the logical name of the file using sp_helpfile and have checked it against sys.masterfiles, sys.database_files and sys.sysaltfiles, all match up and confirm the name 'test_log'.

I rebooted the server last night and was able to shrink the first couple of .ldf's I tried so I presumed it was fixed. This morning when I try again i get the sanme error, I don't see anything in the SQL server or system logs that indicates a change.

I am able to add new log files and remove log files, however if I add a new log file (test_log2) and then try and truncate that file I get the same error.