i1Profiler scanner module is very picky about file formats

When I try to load a Reference File, I keep getting the "Error reading from reference file" message? I have some hand-measured IT8.7 Reflective targets I would like to create scanner profiles from but no matter which one of the supported Target Type I select, i1Profiler stubbornly refuses my measurement file. I tried this on both the Mac and Windows version of the software to no avail. Any ideas anyone? I'm about to throw the towel. Best / Roger Breton