I never had any problems with NGX since day one. However, since the installation of SP1c, a small thing has occurred when flying a flight plan.Having setup the FMC with a company route using Flight Sim Commander and the latest Navigraph data after take off, and the autopliot activated etc, the aircraft begins to fly an S pattern in heading toward a waypoint. After passing about 4 or 5 waypoints things straighten out. I am using Sids and Stars where possible but I can't imagine that would be a problem. Very strange. I attach a pic to illustrate the problem.Sure could use some help on this as it has me stumped.Jack FentressRe; the attached pic, I couldn't get it to attach.Jack Fentress

Very unlikely this has anything to do with SP1c; however, without the pics it is difficult to understand the problem. Constant s-turns along the route? Do you cross each fix or fly by it? Is the first leg within a few degrees of the runway heading? A little more here please, or try again to post pictures (just make sure they are not too large).

Open your pic in paint > save as > ''jpg''.Alot smaller format than the BMP i suspect your tryin to attach..whitch is to large.