Okay, now I'm getting it. However, the second part isn't working for me.
CF2: Iif([AorB]=0 or [AorB]=1], Cstr[CF1],"Error")
I've tried removing the extra ] thus: CF2: Iif([AorB]=0 or [AorB]=1, Cstr[CF1],"Error")
but it keeps coming back to invalid syntax error???
Thanks for the help so far!