Hello, I use ENVI Version 5.0. I have LANDSAT8 data that I download from the web. Although it worked in the past, I cannot open the files properly: I use: Open AS - Landsat - geotiff with metadata text file, select the MTL file, and get the error message: "File does not appear to be a valid tiff file" Although I use the original TIFF files and it worked in the past. The problem is with images from the Sixth of June 2013, path 174 row 37-39. Thanks Gilad