Yesterday I had a problem importing a new netlist and having layout 9.3.1 crashing. After deleting the net section. It still crashed. After deleting 30 components it worked fine. I then added back the components and deleted 30 different components and it worked fine. THen I went to version 9.0.1 and it worked fine. Anyone have a solution or do I have to spend another $5000,00 on maintenance in the hopes Mentor might fix this ?