This error is being caused because the admin cli “dsmadmc.exe” cannot find its message file. Firstly check that dscenu.txt exists, it should be in the c:\program files\tivoli\tsm\baclient directory ( if you installed the tsm client in the default location ).

If it does exists try adding the following environment variable.

DSM_DIR=C:\Program Files\Tivoli\TSM\baclient