List of error messages ?

Hi Guys,

Yesterday I and one of the guys in the squad fly a training missing at which I got following error message on the TGP:

TGP XERROR

The closest to this I found in the forum is TGP XR ERROR (http://forums.eagle.ru/showthread.php?t=85100) but I am not sure that I get the answer.

Does anybody knw if there is a fault list somewhere that described this message or know what it is about. I just reset it and flew on.

Cheers

Hans