You could try - make a backup copy of the job, run through the CATDUA batch to clean. I like to exit catia a few times/day, it seems to be more stable.
Certified Drivers, not Latest Drivers. They are not the same!
Are any of the parts in 3D you have open related to the drawing you are opening? Is CATIA trying to turn the parts to Design Mode, and you are running out of memory?