This function is used in Python Scripting.


When called in a Vision Client, it operates exactly like system.nav.openWindow, except that if the named window is already open, then an additional instance of the window will be opened. There is no limit to the number of additional instances of a window that you can open.

When called in the Designer, it operates similar to system.nav.openWindow, except that if the named window is already open the function will swap to the opened window. Additional instances will not be opened. A warning is issued indicating why a new instance was not opened.

Client Permission Restrictions

This scripting function has no Client Permission restrictions.


system.nav.openWindowInstance(path, [params])

  • Parameters

String path - The path to the window to open.

Dictionary[String, Any] params - A dictionary of parameters to pass into the window. The keys in the dictionary must match dynamic property names on the target window's root container. The values for each key will be used to set those properties. [optional]

  • Returns

Window A reference to the opened window. Refer to the list of window objects.

  • Scope

Vision Client

Code Examples
Code Snippet
# This example opens three copies of a single HOA popup screen.
system.nav.openWindowInstance("HOA", {machineNum:3})
system.nav.openWindowInstance("HOA", {machineNum:4})
system.nav.openWindowInstance("HOA", {machineNum:5})

system nav openWindowInstance, nav.openWindowInstance