On 31-12-2014 21:03, sboydlns@... [firebird-support] wrote:

>
>
> I have just migrated a system from Firebird 1.5 to 2.0.7.13318 running
> on Windows 2008 R2. I backed up the data using gbak on 1.5. and reloaded
> it using gbak on 2.0.7. Now on 2.0.7 I am being plagued by:
>
> Attempt to call GlobalRWLock::unlock() while not holding a valid lock
> for logical owner
>
> The application is the same, the only thing that has changed is the
> Firebird version.

Have you checked the database with gfix?

...

> 2. How can I resolve this issue? I had this happen at one other site and
> I resolved it be regressing to 2.0.5 but I no longer have, nor can I
> find, the installer for 2.0.5.

For Windows 32 bit you can find the 2.0.5 installer at
https://sourceforge.net/projects/firebird/files/OldFiles/firebird-win32/

Mark
--
Mark Rotteveel