ok if i try to do a restore of the fbk taken from the 1.5 server on the 2.5 64bit server with the following command
gbak -r -p 8192 -user sysdba -password pass /opt/firebird/fbbackup/stock.fbk /ibdata/stock.fdb

The error i get is
gbak: ERROR:Malformed string
gbak:Invalid metadata detected. Use -FIX_FSS_METADATA option.

if i transfer the .fdb file across and try to perform a backup of that fdb i get the error
gbak: ERROR:file /ibdata/stock.fdb is not a valid database "

having used the command
gbak -b -t -user sysdba -password pass /ibdata/stock.fdb /opt/firebird/fbbackup/stock.fbk

--- In firebird-support@yahoogroups.com, Philippe Makowski <makowski@...> wrote:
>
> 011/1/13 crizz11 <crizz11@...>
> >
> > HI all, trying to migrate from firebird classic 1.5 32bit to 2.5 64bit on linux. Whenever I try to do anything on the new 2.5 64bit server with database files from the old 1.5 32 bit server i get the following error. " gbak: ERROR:file /ibdata/stock.fdb is not a valid database "
>
> and what did you did exactly to get this error ?
>