I've included the crj200 customs datarefs into uipcxdatos assigning a number to each one, as indicated by francisco sedano (ex 123 CRJ200/etc int y). The same i've done into datarefs file, but without the number. Uipcxdebug indicates that the datarefs could be not finded. with standards xplane datarefs the connection between iocp and crj200 simulator by means uipcxdatos works very well. I can change the hdg, the alt, etc. Directly by the encoders. Could samebody give me who i'm making mistakes.??? Thanks a lot