Hello Umberto,
I just installed MEM and had elevation issues. This is not uncommon and I have fixed before through Vector AEC. I applied ORBX elevation corrections and reloaded the airport. Now the ground textures are missing and the buildings are gone. I went into the ORBX vector files and verified that all the KMEM files in Vector are disabled or set to default. At this point, I'm not sure what to do. Is it possible that I need to adjust me texture or mesh resolutions to get the airport to show? Did I miss a FTX vector file, or should I just set them all to off manually.
Thanks,
Dave