Thanks for your answer, but I noticed that in the previous server (
Fedora Core 2 + FirebirdSS-1.5.2.4731-0 ) those attributes are equal
than those in the current server ( debian etch +
firebird2-super-server 1.5.3.4870-12 ). And the bug never appeared in
the previous server with the same database.

Another point to think about is wether the "Lock manager out of
room" error is cause or consequence of those errors found in the
/var/log/firebird.log files that I described previously (INET /
inet_error ..., I/O error for file ..., Error while trying to write to
file and Bad file descriptor)

Aldo Caruso