Leonard Evens wrote: > I calibrated my monitor and printer a while ago, and I have to do it > over again. But, of course I've forgotten how to do everything. So > please excuse me if I ask some really stupid questions. I've got in the habit now of creating a "readme.txt" file in these situations - a shortcut to recall what I discovered and did last time I worked on a project. Cut & paste working command lines into it, notes, gotcha's etc. > When I run > dispcal -yl -r (or -R) > I get > dispcal: Error - icoms - set_ser_port: port number out of range! > What does that mean? Sorry, not a good error message. It means that it couldn't see any instruments. spotread -D2 may reveal more. Graeme Gill.