When this type of error is taking place, you must have to keep it in mind that, you probably missed some point while installing Qemu. If you want to install Qemu host into a Mac OSX lion, I suggest you to view this video tutorial. By following step by step this tutorial, you will able to install your Qemu. Here is the video tutorial –
In your error message it has shown that, it affected by some problem or encountered by something. In this situation, I suggest you to remove this total software from your system and reinstall it. May be then you get resolved perfectly.