I'm using autocad lt 2006, currently I have big problem with memory usage. When I work with dwg file something around 2Mb autocad takes a lot of memory. After working 5 minutes it is around 300Mb( even if i don't use any tools memory usage increases). I wonder if anyone has problem like this. Sometimes after working ~1h autocad hangs and crashes but not always. I've searched for this problem i autodesk knowladge base and found nothing. Thanks for help.