Error creating Constructions

[Peeters]

I got a problem with creating/editing constructions. When I want to add/change/remove a material from a construction, IES-VE got stuck and I have to restart it again. So I'm not able to create new constructions. Does anyone know where this comes from?

[Yahya]

Is this only happening with a specific model? or it is also the case with new project? could be the model or the application itself!