Auto() misbehaves

[Chrid]

Hi all, I'm using remote tscript to control a switcher (VT3). I've got a problem with the Auto() command, if I issue it via tscript, it will quite often switch channels on the buses when the command is issued. The only pattern that I can observe is that it will usually fail the first time on a pair of channels, but may work itself out with subsequent issuings of the command.

Due to other problems that I have (the switcher not waiting for vsync when told to switch channels, for example) I have to use Auto(). Is there something that I should be doing/not doing apart from simply issuing an Auto()? If I manually press the Auto button on the switcher onscreen, it works fine.

Thanks,
Chrid

EDIT: This only seems to screw up when I'm switching live video (from cameras for example) - it's something to do with vsync maybe???