Hi, I encountered two small issues (in a relatively recent win snapshot): I can't plot a time trend, got an error "no suitable data found". (I wanted to show students that it's linear...) And apparently deleting variables currently does not affect any named lists to which the variables belonged, leading to errors later on that are hard to diagnose. I'm not sure what's the correct thing to do here; maybe issue a warning at deletion-time if the variable is a list member ("deleting variable foo will invalidate lists bar, baz")? In any case I think it really should be possible to get a list of all existing lists and remove a list from the session. (Or is it already possible and like always I should read the manual first?) Thanks, Sven