Set Simics to break simulation when the graphical breakpoint defined by filename matches.
A graphical breakpoint matches when its image appears on the screen, in the same location as when it was saved. The breakpoint must have been created using the Simics GUI or the command <graphcon>.save-break-xy. The screen is checked for matches every interval seconds of host time, or in virtual on the clock associated to the console, if the attribute refresh_in_virtual_time is set on the console. The -once flag causes the breakpoint to automatically be removed after it has triggered.