I removed all generic buildings from the default airport with small exclude areas (only a few metres) to get my attached effects working. But today I wanted to delete the default txiwaysigns and so i added larger exclude areas. But the default taxiwaysigns are still in the scenery. Also a fuel station can´t be excluded. I also tried again small exclude areas just over the taxiwaysigns but nothing happened. I use SceneGenXb32 for the exclude areas. But still i don´t know why it works with the buildings but not with the taxiwaysigns. If i use one large exclude area everythings gone but unfortunately my effects also.