What target property must be specified while passing a object type variable to child package in SSIS 2012

What target property must be specified while passing a object type variable to child package in SSIS 2012???

As shown below, there is variable strVar and it's Value property is selected. Likewise you have to select the property that you need to pass.
Please refer:
http://www.bidn.com/blogs/MikeDavis/ssis/155/passing-variable-values-from-parent-package-to-child-ssis
-Vaibhav Chaudhari

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    ram.

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