I compiled the Qt Import-Export Example for 64bit Linux (Debian Lenny), but unfortunately I noticed that the IGES import became very unstable. I use Qt 4.4 and OCC 6.3.0. The import of almost all IGES files crashes the application or the geometry will be damaged. I used the _OCC64 option for the compilation. I realized that the problem is caused by a conflict between Qt and Open Cascade on 64 bit Linux systems. If I remove all Qt objects and declarations in the program and if I compile and run it as a simple console application everything works perfect. As I downloaded the newest Tar archive form OCC I saw that the 64bit Linux support was now removed from the Qt IESample.pro file.
I would be glad to get some ideas how to resolve this problem
Thank you in advance