Ryzom

It's not a solution, but you can compile it in "release" mode instead of "debug"

I compiled it in "release" mode instead of "debug".
and then, error running.

----------------------------------------
// "opengl" (default) or "direct3d"
driver = "direct3d";
----------------------------------------

what is wrong?

Do you have MFC? (you must pay for...). There is some MFC dependencies on NEL tools, so I didn't compile it.
Don't try to compile it if you don't have MFC, but download the precompiled tools.

If you have MFC, Maybe your direct3d dll is out of date (in objectviewer directory). If you have compiled Ryzom core you can update your dll with the new compiled.

And what happens with OpenGL driver ?

OpenGL driver is more up-to-date than Direct3D one because nvidia users are using it on Windows and it's also used under Linux and Mac OS.

I suspect some floats from void CDriverD3D::updateProjectionMatrix () are set to 0.0f and you got division by zero exceptions.

i downloaded "nel_tools_win_x86-0.7.0.7z".
i installed "Microsoft DirectX SDK (August 2009)".
My OS is "Windows 7 32bit".

---------------- in "object_viewer.cfg" ---------------------
// "opengl" (default) or "direct3d"
driver = "direct3d";
-------------------------------------------------------------
I ran "D:\ryzom_tools\nel_tools_win_x86-0.7.0\object_viewer_r.exe".
And then, object_viewer_r.exe crashed.

---------------- in "object_viewer.cfg" ---------------------
// "opengl" (default) or "direct3d"
driver = "opengl";
-------------------------------------------------------------
And then object_viewer_r.exe run normally.

thank u for reply.