Hi Fellows. I'd would like some help here if it's possible. I made all objects for the scenery using GMax, they looked all ok. Used FSSDK 2002 and FSREGEN to make the BGLs and APIs in order to apply them using a FSSC's soil made. During compilation process, no errors. All runs smooth and nice. When I start FS2004 the scenery looks great, with everything showing well, all textures, all txws, ramps and all objects done at GMax at their correct places, showing all textures, and with no visible problems at nowhere. Nice frames too. That is: no aparent problem or error. Now starts the problem: during taxi procedures, no matter what aircraft is being used, and during take-off and climb, everything is ok. Afte some 3 or 4 minutes of flight around the airport region and turning back to face it again, there is allways a 'crash to desktop', as the objects are becoming visible again. Generally happens at some 2000ft distance from the scenery, no matter if using external or cabin views. Important points: - all objects are configured at FSSC with 10nm Range, 10.000m V1 and properly configured V2, among individually radius enought to circle each objetc. - if I compile the scenery without the APIs, that is, only the soil elements, there is no 'crash to desktop': all the test flights run normally, so this is not a FSSC problem. - during the crashes, that little FS error report windows allways points to 3 .dll's responsable for the fact: =sometimes d3d9.dll =sometimes fe.dll =sometimes G2d.dll. These dlls are allways responsable for the CTD on a random way. - the same crash problems show at the computers of another 4 beta-testers, so, this is not a problem with my computer or my FS9. I am really without options here and very sad about this scenery. I can't figure what is going wrong. How can a scenery made this way show itself nicely when at ground and allways crash when flying at some 2000ft from it? Could someone help me on this matter? I'm quite giving it up. I've been working on his scenery for almost 3 months. My best regards, and thanks for being among this comunity. Hornet.