From time to time, when closing af file, I get the above mentioned error message.
The only way to exit the program is to open Joblist in Windows (7), and force Signlab to shut down.
If I have multiple files/windows open in SL, I can continue to work with the other files, and also shut them down, without the error message showing up.
I have 3 licenses, running on 3 different machines: 2 x SL DesignPro v10 and 1 x SL Print&Cut v10. The error occurs on all 3 installations.
I am running Windows 7 using VM Ware Fusion on iMac computers.