To launch Planning, use:
http://<server>:<port>/workspace/?module=HyperionPlanning.planning&sourceApp=<appname>
Additional parameters:
Optional: showViewPane=true/false
False hides the left pane when the module is loaded. The default value is true.
Optional: bpm.logoff=true/false
False prevents the system from logging off if using the same session. The default value is true.