CGAL users discussion list

["Laurent Rineau (GeometryFactory)" <>]

On mardi 07 juin 2011 21:42:41 Liang wrote:
> Thank you for your reply.
> 
> It turned out that my path setting was fine but the QGLViewer2.dll file
> which was used for linking was kind of messed up.
> 
> But now I only can run it from Release mode. When I change to Debug, the
> command line window would say "QWidget: Must construct a QApplication
> before a QPaintDevice" and no QGLviewer window showed.

I have seen that message several time in the past. Each time at runtime 
Windows found some Qt libraries (in the PATH) that were different from the 
one 
that was used during the compilation.

Use the tool depends.exe, that is shipped with MSVC. That tool will show you 
which Qt libraries are actually used at runtime by the application.

-- 
Laurent Rineau, PhD
R&D Engineer at GeometryFactory           http://www.geometryfactory.com/
Release Manager of the CGAL Project       http://www.cgal.org/