Thanks for the replies. Basically I want to do the following.
I have a global name GlobalName defined. It can have the values "A" or "B".
In cell a2: @if(GlobalName = "A", a1)
In cell b2: @if(GlobalName = "B", b1)
If cell a2 has the value from a1 then if GlobalName = "B", I want cell a2 to
stay the same and not get changes. This may be an invalid attempt on my part
but basically, if the IF condition is FALSE, then do a NOOP.
Pete