restore a database

Hi,
I have a msde backup file.
I want restore a database with this backup file, but i get
the following error :"Error 3256
The backup set on device '%ls' was terminated while it was being created and is incomplete. RESTORE sequence is terminated abnormally"
I suspect that the .ldf file is damaged.
How i can manage this situation ?
Can I restore a database without a transaction log.
Others backups are not avalaible.
Could you help me?
Thanks

GianoTo attach the database you should have .MDF which should be properly detached earlier. Your query refers to backup file that means it may be .bak file or to a backup device.

And 3256 error indicates that the backup set is not complete because the backup operation that created the backup set did not finish successfully.

So make sure to take full backup without any interruption.