IGES import freeze on incmesh

[Mannshoch]

I try to import a 900MB IGES. The import stop after running incmesh a while (Progress 52%).
There is no error. The only indication that something happens is because CPU usage goes down to 0%
Click on the red button to abord does not work. Mayo has to be force closed.

Tested in Mayo 0.8 and 0.9 on Windows 10