New Post: Error "the formula for derived metric is incorrect"

Hello,
I've installed both the components below on a machine that has iserver+desktop

1. RScript Functions Installer from http://rintegrationpack.codeplex.com/
2. MicroStrategyR Package for R from http://CRAN.R-project.org
   

I'm using a simple example from tutorial - Monthly Revenue Forecast report. I was able to successfully generate the metric definition using SeasonalForecasting.R script

Once I insert the definition below into the derived metric editor, it complains about the formula being incorrect. I've tried using both desktop and web.

RScript<_RScriptFile="C:\Program Files (x86)\R Integration Pack\RScripts\SeasonalForecasting.R", _InputNames="target, trend, season", StringParam9="SeasonalForecast">([Revenue], [Month Index], [Month of Year])

I believe after installing RScript functions installer, MSTR should be able to recognize the RScript function. Is an R function supposed to be populated in the f(x) list in derived metric editor or could I be missing something else?

Once we get it working in tutorial (with knowledge of all components required), we plan to deploy this in our enterprise solution.
Your help is appreciated!
Rishika