[Paraview] Paraview 3.6.1 Connection definition file

[Rick Angelini]

I'm building a connection definition file and I've run into a problem 
... apparently, I can't have two variable substitutions in when building 
a command argument?

 <Argument value="-l select=$NUMPROC$:ncpus=4:mpiprocs=$PTILE$"/>

I can substitute either $NUMPROC$ or $PTILE$, but not both .... I get a 
blank string returned if I try two variables.   Is this a know bug, and 
more importantly, is there a workaround????