CGAL users discussion list

["Laurent Rineau (GeometryFactory)" <>]

Le mardi 09 février 2010 12:42:17, 

 a écrit :
> Hi all
> I'm  a msvc compiler user..
> Usually, most of demo programs generated with release mode work well, but
> not with debug in CGAL 3.5.1.
> When execute an demo program(e.g. AABB_demo)  generated with debug mode, an
> error message , 'QWidget: Must construct a QApplication before a
> QPaintDevice' , appears.
> 
> My qt4 library is well compiled with both release and debug..

I have already seen that error message from Qt4. The reason is probably that, 
at runtime, the DLL files that are used by the application are from different 
Qt4 installations. You should control what you have in your PATH.

The tool depends.exe can help you find you which DLL files are used at 
runtime.

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