I guess mark's right. Your have to function would had to return a parameter list data type in order the INLIST could work, and there's not such a data type.

Instead your function can return a string, formated like a parameter list, this string can then be macrosubstituited as a parameter to the INLIST, and works, we implemented like that.

You'll have troubles if your string gets longer than 256 characters, I'd like to know how you solve this.