Thanks for your answer.

Yes, I'm connected to my database.

The sp_helpfile gives this answer:

QSM_Data  1  C:\Datawatch\DBBPS\QSM_CRIPT_Data.MDF  PRIMARY 102400 KB Unlimited 10% data only

QSM_Log    2  C:\Datawatch\DBBPS\QSM_CRIPT_Log.LDF    NULL 1451456 KB Unlimited 10% log only

If I run the command:

use QSM

DBCC SHRINKFILE(QSM_log,TRUNCATEONLY)

I have the...