In Ignition 8.0.7-nightly and Ignition 7.9.12,
errorBox and warninBox message don’t take in account the desktop like messageBox
With 2 desktop open, and a button action Performed,
errorBox and warningBox are always openend on the primary desktop.
import system
system.gui.desktop("primary").errorBox("message","title")
import system
system.gui.desktop("secondary").errorBox("message","title")