<t>I was able to narrow done the problem:<br/>
- it occurs with V6.5 too<br/>
- it occurs when I start the application and try to open a model (any model), which I created earlier<br/>
<br/>
And I found out, how to open a "old" model, but it is a bit strange:<br/>
1. Start the application<br/>
2 ...

<t>I can create a new model with some rooms and some standard furniture.<br/>
As long as I don't close the model, everything just works fine.<br/>
<br/>
But when I close the app and reopen the model the application freezes.<br/>
So I'm not able to edit/reuse a model!<br/>
<br/>
What's wrong here?<br ...