You have 2 simulators running successfully, and they continue to do so, even after the error message that one of them generated? Is it possible that you had, immediately previous to the starting of the TFSimulator that generated the error, shut down another TFSimulator?
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<br>The next time this happens, shut down all TeleFlow Simulator windows, and go to your \Program Files\TeleFlow directory. Locate and send the log files modified on the date of the error to
support@engenic.com. Make the subject line: "DEVNET: TFSimulator.exe has encounted a problem". We will review and post our response in this thread.