The easiest way to open a Citrix App from an automation process is to create a shortcut to it on the desktop, and then click on it. This is done as follows:

1. Create a shortcut for the target Citrix App on the desktop.
2. Add a Click activity. Select Indicate on screen and choose the corresponding shortcut.
3. From the Properties panel of the Click activity, check the SimulateClick option.
4. Press F5 to execute the process and notice that the Citrix App is launched.