I'm running V5.8.0 in Windows 10 and working through ALPY spectral calibration [method 1 from C.Buil's site translated by Robin Leadbeater]. Using just 4 images of HD27819 to try it out. All is OK, spectrum calibrates, log file shows research lines are within +/-7px and RMS~0.5A. However click on "Dispersion" button shows A0-A4 with all zeros and no pixel data in boxes [the 7 wavelengths shown but with no pixel readings range from 6382.992 - 6717.043A. These are neon. I have "ALPY without calibration module" selected in "Settings"] . A sensible set of numbers for A0-A4 are recorded in the log file, but don't appear to be transferred into the "Dispersions" table. I've checked that I'm using the same settings shown in the method 1 summary and also restarted ISIS a couple of times, but the table remains empty - wondered if anyone can help?