Phil,
Now that I understand that you were using one of the panel editors, what you describe seems to make sense, but only almost.
Certainly it is common for the panel editors to each make any name change requested to be repeated for all occurrences within the file.
In version 4.17.2 changing the user name of a memory variable does also change the use of that name in a Logix conditional. I have not tried to change a system name, but nothing you have written here indicates that you intended that kind of a change.
Perhaps my attempt to duplicate what I think you have described is too simplistic.
Cliff
