In every two or three days I catch on a random one of my hosts a NATHAN_dhfr36 workunit staying at 0% progress after a very long time (while the GPU usage seems to be normal). I've caught one after 86 hours. Some of them can be fixed by a system restart.
The latest one is this workunit (my host is the 4th). It was hanging for 15 hours when I spotted it, a restart didn't helped in this case, so I've aborted it. It usually happens on my multi-GPU hosts.

Well, that's strange. Thanks for letting us know. For the most part my NATHAN workunits have been very stable and giving low errors, though I'm not sure if such issues like you have experienced would be seen in the error statistics (I'll look at that). Since crunchers have been complaining about this type of problem more often recently (meaning stuck work units), I wonder if there is some subtle issue with the app/client/driver, and not just a specific group of workunits... I'm noticing some very strange error messages in that group you linked. Hmmm...

I've got another one of this. I've spotted it after 74 hours...
After a system restart it's ran into an application error.

Earlier today I had a W7x64 system blue screen and on restarting the app crashed. It was a NOELIA_PEPTGPRC WU, however I also got the Kernel error message,

Kernel not foundAssertion failed: a, file swanlibnv2.cpp, line 59

Might be something in it.

Is it wise to abort this WU: I41R15-NATHAN_dhfr36_6-8-32-RND7935?
By five previous crunchers it errored out. On my GTX550Ti it will take another 34 hours to complete after 1 hour and 20 minutes gone (9.5%).
Thanks for the input.
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Greetings from TJ

Cannot see your set up but if in doubt, abort. 5 resends does not inspire confidence!

This is the WU http://www.gpugrid.net/workunit.php?wuid=4427345.
Has 51% done in 7 hours.
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Greetings from TJ

Thanks for your explanation skgiven!
I will let the WU run, still 5 hours estimate, so I let it know tomorrow how it ended.
Indeed I have set to use GPU always and nod driver op app problems.

The only error I had the last weeks was when Microsoft was updating the nVidia driver, what I terminated and I did set that Microsoft only is allowed to update the Windows stuff and I decide when to install and the reboot. Mostly I set BOINC to no new work, to be sure.

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Greetings from TJ

Thanks for your explanation skgiven!
I will let the WU run, still 5 hours estimate, so I let it know tomorrow how it ended.

First NATHAN_dhfr36 task finished in 4.96 hours on 660TI running Linux Mint. No problems and 70,800 credits. Will be rebooting to XP soon to see how they run there.

First NATHAN_dhfr36 task completed without errors on XP with 660TI. Took about 13 minutes longer than the same card on Linux Mint.

Thankfully the NATHANs are back so all 7 of my GPUs can again run GPUGrid. So far have run hundreds of the NATHAN_dhfr36 WUs without any errors that I know of (TONIs too).