Hugo,

> I am trying to use my application while gbak makes backup, but a message is
> raised 'File alredy in use by another'.

Is gbak running on the same computer as the database?

Are you trying to access the database via network share?

Which FB version and server type (classic, SuperClassic or Embedded) are you running?

Have you tried running SysInternals utility to find the name of the application/process which had the file opened?


Sean