Custom aerial images - cgl compile bug?

recently i tried to generate some aerial images. in the past i allready did that without a problem. Once i made an aerial image with 17.000 tiles

now when i want to generate an aerial image with 6.000 tiles the compiler is generating 2.000.000 temp files and it lasts a huge amount of time after that generating it is starting to generate the .cgl file but until now that task never finished.

some one else could not finish to make an aerial image with the latest version of the sim?