Sorry to sound negative, but really I am very frustrated on this issue.
With version 8, the main problem was that if you happened to minimize the screen to the task bar, then when you attempted to maximize it, the session froze and errored out. So off you go to task manager, close the software and reopen. I know maybe not a big deal for folks on multiple screens, but I use a single 30 inch and it drove me crazy. I opened a problem ticket on that also and Phase One worked with me and others and a fix was released with the last version of 8.x and IT fixed the problem.
This problem has been going on since the release of 9.x, and EJ brings up a great point, in that if you have a lot of adjustments, or layer or both, the issue will show up sooner and then create total havoc. I personally love C1 for all of the tools it offers so I guess I am seeing the issue more than others.
As Bart mentions, if you go via batch, you don't get the error, you just have to go back and edit your files to make sure all processed as if one got the problem, it won't process out. This caused me to start going one at a time (I know that is time consuming but so is going back and editing out a large batch job), so I am seeing the problem sooner or more often than most.
Where I am frustrated, is that it has shown up on all my windows environments, (various hardware and win7 and 10 and
![Cool 8)](https://forum.luminous-landscape.com/Smileys/default/cool.gif)
, Surface Pro, Macbook Pro, PC etc. So Phase One, should be able to see this pretty darn quickly. BTW all of those environments are using different video cards, all are "supported" by Phase for open CL, so it's not just my Asus PC's. Phase One's only answer, turn off Open CL, which to me is not the right answer especially with the investment I have made in video cards for C1 and LR, and the fact that I am mainly processing larger files in C1 to start with mainly Phase One back images. You can run a script that turns off open CL for C1, but that also effects the open CL for display, (drawing masks especially) and in a IQ100 or IQ280 file you really need the boost of open CL for the adjustments. Just turning off open CL for processing in the C1 preferences doesn't seem to help, you have to run the script. So for now, I work with Open CL for image work, then close C1, run the script, reopen C1 and start processing.
Paul C