Hi! thanks for your support.

When I said "crashing" I actually meant that if backing up a database
with users connected could cause a corruption on it.

So, let me see if I understood. Gbak itself can't cause a corruption,
right?

The problem must be something else there. In this database, gfix
wasn't pointing any problem. Then I tried to make a backup. At
certain point at the beggining of a table gbak seems to freeze (it's
not actually frozen since CPU stays at 100%). It takes about 45
minutes until I see some progress on gbak.

Anyway, I don't know what caused this corruption but it's preety
clear to me that gbak has nothing to do with it.

Once gbak made the backup and I restored it, the problem was solved.
It's just strange that gfix wasn't pointing anything.

Anyway, really thanks for helping.

Rodrigo.