At 07:19 a.m. 13/02/2013, you wrote:

>Hi,
>
>I noticed that after installing XE3, and installing latest sources of IBO, and getting all to compile that I could no longer connect to my databases, using my apps, some compiled with Delphi XE.
>
>I then removed the interbase XE3 from my PC.
>
>I can connect using a third part SQL tool to my databases, but not using IBO, even with my previous versions of software compiled with XE.
>
>I reinstalled FB 2.5.2.26539
>I checked that service is running in services manager Win7 64 bit.
>
>When I try to log on to any application I get:
>ISC ERROR CODE: 335544375, Unavailable database.
>
>All the databases are there.
>The service is running.
>
>Any ideas what could have destroyed all that was working up to installing XE3, and Interbase support that gets installed by default.
>I have removed the interbase for XE3 from my system.
>
>When trying to connect to my remote server with my software also written with Delphi XE, and IBO, the remote host refuses the connection, but I can connect to it using my SQL tool.
>ISC ERROR CODE: 335544421, connection rejected by remote interface.

Seems to be a problem with the client DLL. If the application is 32-bit then it needs to find the 32-bit fbclient.dll at loading time. You'll find a copy of that in the WOW64 folder of your Firebird installation.

Also check that the IB XE3 installation didn't leave a copy of gds32.dll behind in your system directory or somewhere else in the path.

Helen