dll error in all tools

I have installed the Qt Open Source edition (the Windows installer one) from the home page (C++, WinXP) and I've run configure from the VS Command prompt. Took about an hour and seemed to work okay but when I try and go into any tools (from the Start menu or the .exe's) it comes up with a dll error, saying it can't find an entry point. For example, when I run the designer it says:

The procedure entry point for _Z17qt_message_output9QtMsgTypePKc could not be located in the dynamic link library QtCore4.dll.

It comes up with the same message if I try to run the Examples and Demos launcher or the linguist or the Assistant - ie. any of the tools that are on the start menu.

Is there anyone who can help? Have I not completed the install or what?

I think that I had such a problem some while back. It might happen when you have installed an older version of Qt (possibly one that you compiled yourself) or incompatible Debug/Release versions of Qt on your system.

It might help to inspect that problem closer by using tools such as Dependency Walker (link) to see where your OS searches for DLLs and which are loaded.

Since the Qt Open-Source installers install the binary versions of the tools on your system, there should not be any need to re-configure and build the whole Qt4 libraries again.

Also, it might be a good idea to install a "fresh" Windows into a virtual machine (VMware, Parallels, etc) and try your luck there.

Possibly you are using incompatible/older versions of MinGW tools?

Hope that helps..

Thanks for replying but it's fine now - I have 4.5 and that's working perfectly (so far ;) )