composeProperty and decomposeProperty [ Marshalling and Demarshalling ]

I want to know that how composeProperty and decomposeProperty for
Marshalling can be created and implemented.
I m not using CORBA.

I want to use Cartesian Position tracker along with Cartesian Generator to
track the points.
My program load the Position Tracker but in output I am getting

 In Task MyTrackingKernel. (Status of last Command : done )
 (type 'ls' for context info) :CartesianGenerator.moveTo(frame(vector(0.4,
0.6,1.2), rotation(90.0, 0.0, 0.0)),1.45)
      Got :CartesianGenerator.moveTo(frame(vector(0.4,0.6,1.2), rotation(
90.0, 0.0, 0.0)),1.45)

 In Task MyTrackingKernel. (Status of last Command : queued )
 (type 'ls' for context info) :

 In Task MyTrackingKernel. (Status of last Command : done )
 (type 'ls' for context info) :CartesianPositionTracker.isTracking()
      Got :CartesianPositionTracker.isTracking()
 = false

 In Task MyTrackingKernel. (Status of last Command : done )
 (type 'ls' for context info) :

Can this purpose be solved using the 'Default Marshalling' option?

--
H.S.Randhawa

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