In case of a problem launching the preview from ATE, use the debug message window to help clarify what is happening. Call up the A-Shell GUI Control Operations dialog with control+shift+double-right-click, then select Show Debug Dialog. When the debugging/trace window comes up, repeat the print attempt. It will log the command string that is actually being used, which might then be helpful to test independently, such as from Start..Run, or at least useful in identifying the problem.