is that the complete error message?
Have you tried to redownload the patch from the Aces High website and reinstall?
Try rebooting your computer and then reinstalling the patch that you have already downloaded
Have you tried to go to the Aces High 3 folder and try to load the game by clicking on the DX9.exe or DX11.exe ? Could be a messed up shortcut icon
Is hard to give a correct response, without the complete error message
TC