I never knew that LIST /U will display a ruler on the second line until I read it in the help file a few minutes ago. When I tried this in v15, it worked perfectly. However, it didn't work for me in v19 (64-bit 19.10.51, Win 7). Not only was the ruler not displayed, LIST itself immediately exited and the prompt was placed at line 0, all without my ever pressing a key. Thanks in advance for looking into this, and also for not telling me to use VIEW instead of LIST. Old habits die hard.