Hi, I am completely new to IDL and also on this forum, and am to receive IDL software said to be "targeted at IDL version 6.3" and known to work under Win XP sp. 2. I cannot see any place to download older versions of IDL (and am not sure if I would want to if I could either). I am therefore interesting in knowing whether there are any known serious issues/problems that I should take into consideration if I want to run this software under the newest version of IDL (on XP sp. 2). I am not asking for details, only more general comments on transferring from 6.3 to the newest version. Also, I do not yet know if the software developers expect med to work at the code level. Basically, I only need to run the IDL software as it is an evaluation tool for another equipment. Thanks. Best regards, Frode Langset