No particular command causes the crash. It looks like as if the computation takes longer and longer, the farther I go with the model. Just load the MapleWorksheet (which I attached to my first entry) into a Maple program and hit the return key after every line. After several lines you will see the problem. Or load it into a MapleProgram and click on Edit->Execute->Workfile.

I am afraid I cannot only post the commands here. It would take forever I am quite happy that I could write my whole model into the worksheet although uncomputed.

And how do I switch off the autosaving-feature?