Hello, I use ENVI Version 5.0. I have LANDSAT, 5, 7 and 8 (L1T) data downloaded from http://earthexplorer.usgs.gov/ When I try to open th files to start working: Open as> Landsat>GeoTIFF with Metadata> and select the MTL file, I get for all cases the following error message: "Unable to recognize the file type on the input" I opened ENVI CLassic as well. Open External File> Landsat> GeoTIFF with Metadata, and also in all cases the following error occurs: "Problem: error was encountered reading this file. Error: Array dimensions must be greater then 0 I have tried to download also ENVI 5.0 Service Pack 3 (SP3) from My account/Downloads/all downloads but i cannot find anything for ENVI 5.0 How can I solve this problem? Thank you in advance! Cheers, L