[Qt-interest] Qt 4.5.1, MSVC2005, WinXP: Problem loading qsqlite plugin dynamically ondeploymentcomputer

[Bill King]

ext Jeffrey Brendecke wrote:
> Thanks for the suggestion!
>
> I am in the process of recompiling qt to not load the qsqlite driver as a 
> plugin. If I still have problems I will give what you suggest a try.
>
> I have seen through some searches on the Internet a number of cases of 
> develpers having issues loading db drivers as plugins at runtime, and not 
> many examples of the problems having been resolved.
>
> -----------
> On Monday 13 July 2009 20:08:52 David Ching wrote:
>   
>> "Jeffrey Brendecke" <jwbrendecke at icanetix.com> wrote in message
>> news:200907131850.18784.jwbrendecke at icanetix.com...
>>
>>     
>>> Thanks for your reply!
>>>
>>> This is my error in the mail (I forgot to indent one more).
>>>
>>> The relative path to the .dll from the directory where the application is
>>> installed is:
>>>
>>> plugins\sqldrivers\qsqlited4.dll
>>>       
>> Aw, I thought it was going to be easy!  ;)
>>
>> I had an issue with an imageformats plugin which I debugged by tracing into
>> the Qt code that attempted to load the plug-in and saw where it was
>> failing. Perhaps you could do that here.
>>
>> Since you're using VC2005, you have a first class GUI debugger!  :-)
>>
>> Thanks,
>> David
>>
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>>     
>
>
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>   
Sometimes setting the env variable QT_DEBUG_PLUGINS=1 and running the
app helps to track down the issue. if you're not compiling against an
external sqlite, then there should be nothing missing dll wise. Maybe
grab a copy of depends.exe and run it on the target system? Sometimes
that shows up missing dlls that cause load failures.

G'luck :)

-- 
Bill King, Software Engineer
Qt Software, Nokia Pty Ltd
Brisbane Office