Thanks. Sorry to vent at you, but trip_to_tokyo didn't even seem to read my entire question.
In your reply of Jan. 1, you wrote: "I can't replicate the error you describe" Well, did you try entering @average(...) or @sum(..)
"I'd guess there has been a recent Office update?" So, as a "moderator" you can't get MS to answer that question?
So, do you have the Lotus compatibility settings checked in Excel Options? I'm assuming you aren't prepared to just use = instead of @ even though it's one fewer keystroke? Don't know, like I said the problem just started in the last week or so. And using = instead of @ is same number of keystrokes! Never had to enter @= together when entering formula.
Started with Lotus 1-2-3 (and dBase 3 Plus!) way back last century. Lotus was smarter then than Excel is now. Could just type 1+2+3 and it knew to sum it to 6. No need to type ***+***1+2+3 to get the same result.
There are probably other Excel things that bug me, but these two are the worst.
Will explore how to prevent MS from updating any more of my Office products. Don't the programmers ["coders"] ever get input from users?