directly and not with the indirection of using Evaluate.
Aaah, I see. Well, that is what I can't do. When creating the calculation field, having written RegP_Replace ( "o" ; target; "xxx") as calculation, I cannot click OK. FM complains: "There are too few parameters in this function"
I also have tried this as calculation: External ( RegP_Replace ( "o" ; target; "xxx") ; 0) FM again complains: "There are too few parameters in this function"
I also tried it with the comma syntax: External ( RegP_Replace ( "o", target, "xxx"), 0) same error
And I tried this: External ( "RegP_Replace", "o", target, "xxx") FM complains: there are too MANY parameters in this function
And this: External ( "RegP_Replace ( "o", target, "xxx")", 0) FM complains: the specified field cannot be found