Read Only attribute set on the companion SCT file to that form?

>I just discovered the tool "Code References". Wow what a nice utility. I was wondering why Microsoft didn't give us that sooner. (well maybe they did in version 8. I went from 7 to 9).
>
>Anyway, does anyone know why some forms refuse to get updated during a global find and replace? It always happens to this one form I have, and I can't figure out what is causing it. I originally thought it was because Windows had it locked (like it does with other files sometimes), but even after a cold re-boot, the replace will not go through. I get the message "*** ERROR: Error encountered during replacement." with no other explination.