Invalid formula keyword found: ServerSideAPI (#EVAL)

Hi All,

I've created a script component and ultimately I would like to use #EVAL[] to return a message to the client side (browser) for me to growl to the user. The problem is I keep getting "Invalid formula keyword found: ServerSideAPI" no matter what rbv_api I use within the test eval block.  Am I missing some sort of set up here?  I don't seem to be able to use any server side api's

I'm also intending to use sendJSONrequest as I need to call a REST service that is on a PUT verb to grab the message, is this a sensible way of getting that infomation back to the browser?  If not, what is the normal approach for this?

Thanks,

Mark