I have an old program that only runs on version 4.0 of IDL. I spoke to RSI and they are unable to sell me this version of IDL (no more support for this version). They mentioned that I could try to get if from someone else that does not need it anymore. I am willing to buy it if you have it for sell along with its corresponding installation key. I really need to run this program. I have tried to convert it so it can run in a newer version, but many of the functions are already obsolete and I can not get it to work. Please help. You can email me at: rgalindo@salud.unm.edu