SPACARS and XP-12

Thanks for the information Smitty.  I don't use XP-12, so I can't test SPAACARs with it.  First, make sure you have the latest XUIPIC, as these interfaces generally update as simulator versions do.  At least that's the case for FSUIPC.  Based on what you're describing, SPACARs is detecting a change in the fuel quantity and/or the time.  You might consider having SPAACARS send the PIREP before you do whatever triggers the messages.  Also, make sure you understand how to reset the error messages.  One of the buttons cancels the popup error, but that will also disable SPAACARs from sending the pirep - but allowing you to shut it down without that popup message in the way.  The other button (I think the "ok" button) is waiting for you to reset the value indicated in the error message.  Once you set the appropriate value indicated in the error message (adjusting the time and/or fuel quantity), then push "OK", and the message should disappear and allow you to send the PIREP.  The values don't need to be exactly as listed in the error message - just relatively close.  If the value entered is not sufficiently close to the required value, the error message will just pop up again.

It's also possible that specific plane models do something with the fuel value upon shutting down the aircraft that trips the error message, so it might be related to a specific plane.

That's all I can guess, and perhaps other XP pilots might have suggestions.

John