What you referenced is point() VEX function But sounds like you are dealing with parameter expressions and therefore using point() [www.sidefx.com] hscript expression function which has slightly different syntax as you noticed
Thanks,tamte. hscript expression functions (which are listed as expression functions in the docs point expression [www.sidefx.com]) are used for parameter fields, not vex functions. This has been a source of confusion for me. thanks for the response.