I have just installed Gary Summons' Heathrow Pro and find that the AI aircraft are taxiing parallel to the taxiways rather than on the centreline. I investigated the AF2 files for EGLL and find I have four :( The stock AF2 is on Layer 11The PAI AF2 is on Layer 42The GS AF2 from UK2000 Part 4 is on Layer 83The GS AF2 from UK2000 Heathrow Pro is on Layer 111Could someone explain the meaning of the layers. Presumably I need to ensure that Layer 111 takes precedence since this is the one compatible with the scenery. Should I remove the others?George

Hi,The higher the layer number, the higher the priority. You should not need to remove the others, but something is clearly going wrong. Do you have layer 111 (i.e. the layer that the Heathrow Pro AF2 file is in) activated (checkmarked) in the Scenery Library?Hope this helps,--Tom GibsonCal Classic Propliner Page: http://www.calclassic.comFreeflight Design Shop: http://www.freeflightdesign.comDrop by! ___x_x_(")_x_x___

Tom,You provided the clue. UK2000 now includes a separate AFCAD area in the scenery library. The installation program for Heathrow Pro placed this below UK2000 Part 4 in the priority list.I've now moved it up and everything is fine.Thank you very much,George