How do you pass a Scriptlet parameter to a SubReport and then use it in the Sub-Report

[dpackwood]

Using iReport 5.0.0 and JasperServer 4.8.0.  

I've created a scriptlet in my main report named "TEST".  iReport automatically creates a parameter named "TEST_SCRIPTLET".  I'm attempting to pass this scriptlet instance to my sub-report using the sub-reports parameters.  That appears to be working ok.  

However, within the sub-report, I am unable to access the parameter (using $P{TEST_SCRIPTLET}), getting a "Parameter not found" error.  I thought that perhaps I needed to create a parameter within the sub-report and map it to the passed value.  However, creating a parameter manually set's is value to java.lang.String, and any attempts to access the methods of the scriptlet within the sub-report give errors that "String" does not support those methods.  I've tried to set the sub-report parameter to "object" and every other option, but I get the same errors.

Is there a way to pass a scriptlet to a sub-report and access the methods within the subreport?

thanks in advance.