QTR-Quadtone RIP

I'm printing some step wedges and I get this message,"Image to Raster has Stopped Working".  Windows says the program will close (there's also a close button in the message), QTR then stops printing but when I hit the close button in the message QTR continues printing and completes the job.

Haven't seen this before.

Should uninstall and re-install QTR? 

Thanks,

Windows 7
QTR Ver. 2.7
Epson R2400
K3 inks