Hi, I am a new SARscaper with an ENVI 4.7 product on my 32-bit Linux system. When I try to generate a DEM(Digital Elevation Model) from SRTM datas (*.hgt files), I am obtaining a DEM file and an anohter file named same with the DEM file in addition with a suffix ".hdr". I can successfully view my DEM file, but when I progress to the next step in order to generate interferogram with DEM, I am encountering an error message which includes the unavailability of the header file (with a suffix ".sml") of the DEM. How can I obtain or create the DEM's ".sml" header file? Thanks