Go through link which you had, ADF: How to restart a taskflow from the menu
Already there is a reason blogged out
When the application described above is deployed the navigation from the menu does not work (properly) if you’re in the details page and then click on the menu entry of the same taskflow.
The reason the menu doesn’t work is that the region concludes you’re already in this taskflow so no actions are needed.
just do the step1. that is just give a partial triggers
Please elaborate what is your requirement.
1.where are your command menu items on a jspx or jsff
2.where do u want to navigate on click of command menu item
a.to a different bounded taskflow belong to menu item or
b.u have a bounded taskflow and inside this to a specific page belong to menu item