Geometry object token not working

I'm trying to launch a viewer command via a hyperlink in the long description. The command is RunWorkflowWithArguments and the arg I'm passing to the workflow is the geometry of the feature, which I should be able to accomplish using the object token {$Geometry}. Here is how I have it in the long description:  <a href="command:RunWorkflowWithArguments?workflowId=HighlightCurrentFeature&inGeom={$Geometry}">Highlight Feature</a>

The workflow has an in arg of type geometry. I'd like to create a kind of generic WF, that will take the incoming geometry, determine what type it is (point, line, poly) and then proceed accordingly.

This is not working, as it appears that no object is being passed into the workflow.

Anyone have an idea what could be wrong?

Trying this with an html5 viewer.

version 4.1.4 of essentials and 2.3 of viewer.

Thanks