[AccessD] Passing OpenArgs to Subreport

Howdy peeps,
Probably simple answer but I can't find anything to specifically to solve my problem, could it be one of those can't get there from here?
 
A2003.
 
DoCmd.OpenReport sObjName, acPreview, strSvcRegion & "~" & strLocality
 
When it hits the main report, which is just a shell with three subreports, I get the 2491 error.
 
I've created a label to hold the openargs string, but it doesn't even get there.  I've tried a couple other things but that just results in
the openargs value in the main report to be null.  I'm trying to pass report labels to the subreport.
 
TIA.