If you are running Vantage on Windows Server 2008, Windows Vista, Windows 7, or Windows Server 2008 R2 you may find that your scheduled tasks may not be running and resulting in an error (error code 2147750687). This error is generated by the Windows Task Scheduler; which Vantage utilizes to run its task actions.
The error means that the Windows Task Scheduler has attempted to run the scheduled task at least two times.
Every hour, the Task Scheduler service schedules tasks to be run over the next hour in a schedule window. If the start time of a task coincides with the end of the current schedule window and with the beginning of the next schedule window, then the task may be scheduled two times. In this situation, the task is scheduled at the end of the current schedule window and again at the beginning of the next schedule window.
Download the Microsoft hotfix for this issue.
Here is a link about the fix and a link to the hotfix download: http://support.microsoft.com/kb/2461249