Strange new error message R6025(pix included)

Greetings,I have been getting this msg for about a week now.It occurs after about 10 to 20 minutes flying, theSim locks up and the msg appears. Does not update FS9.cfg.Only the Sim crashes, not Win98se, and I can start theSim right back up again...Happens when flying from mainland airports, but NOTwhen flying from island of Hawaii....here it is:http://forums.avsim.net/user_files/61385.jpgHave had FS2002 and FS2004 running well for a long time,until now...Google search yields MS info screens dealingwith other specific MS programs, but not FS2004....Any ideas, please?JR