Hello, un_spoken@...!

Friday, June 10, 2016, 10:55:35 AM, you wrote:

uycuFg> I've downloaded Firebird-3.0.1.32529-0_Win32.7z
uycuFg> http://web.firebirdsql.org/download/snapshot_builds/win/3.0/Firebird-3.0.1.32529-0_Win32.7z
uycuFg> extracted it and replaced the exisiting Firebird installation.

so, you replaced security3.fdb with SYSDBA to an empty security3.fdb.

uycuFg> Then I've runned uninstall_service.bat and next
uycuFg> install_service.bat.

this was not necessary.

uycuFg> What I am doing wrong? I've tried to read manuales but did not find solution.

if an old one security3.fdb is gone, do steps of the FB 3 install process,
where you add SYSDBA.

--
Dmitry Kuzmenko, www.ib-aid.com