Hi,
Sorry for my bad english.

Probably I will go to bring up to date the FB Server for version
1.5.2.4731, but only for the knowledge...

What it can be?
It is a known/corrected error?

Error:: Fatal Lock to manager error: invalid Lock id (0), errno: 0

This error occurred 2 times.
First: "20 of April, 14:57:25 2004" and second he was yesterday "22 of
March, 13:48:20 2005".

The server is SMP(2xCPU - 2Ghz), 1GB RAM with Windows 2000 Server.
Firebird 1.5 Super Server [ WI-V1.5.0.4306 ], with the option
"CpuAffinityMask" configured correctly, preventing problems with the
SMP.

In the LOG of the Firebird, I have only this:
---------------------------------------------------------------------------
SERVIDOR (Server) Tue Mar 22 13:48:20 2005
Fatal lock manager error: invalid lock id (0), errno: 0
SERVIDOR (Client) Tue Mar 22 13:48:20 2005
C:\Arquivos de
programas\Firebird\Firebird_1_5\bin\fbserver.exe: terminated
abnormally (4294967295)
SERVIDOR (Client) Tue Mar 22 13:48:22 2005
Guardian starting: C:\Arquivos de
programas\Firebird\Firebird_1_5\bin\fbserver.exe
---------------------------------------------------------------------------