I am attempting to run ATREM to derive reflectance data for three AVIRIS data sets. My attempts to get his to work seem to fail, generating an error message when I run from within EVNI. I have tried to use the information provided in tech tip Article ID: 2776 Article Title: Running ATREM via ENVI Extensions, ENVI may report "The ATREM program did not complete successfully" but this does not seem to take care of the problem. I cannot find the envi_atrem.sav file in the either the save or the save_add directories. Can someone please help me with this problem? Thank you Mark List