If you got a work run in to a stall, a 99.99% progress, then the work are out of sync with your worker.
You need to do:
1: pause the worker
2: Start the worker
Now you have resynced/restarted the work!
HOW do you know that?
First there are really small signs of that.
1: You get restart text in the log, not much to get excited about. Patients dear Whats-son.....
2: You can recognize that the PPD are ricing up. point by point.
3: When the work have achieved another % you get that in the log, still you have the 99.99% in the interface.
4: After another long wait you get the updated interface information with the right % value.
From knowledge base: PPD is calculated as the median of the last 3 frames.
Now you have waited about 15 to ... minutes...depending on your workers speed to finnish 2-4% of work.
There are another way to, that the code are stuck in the GPU, then you don't get explained result, then the only thing is to restart the computer and do the thing again.
Yes, you do not need to delete your work and loose point, you only need to re-sync your GPU/CPU with the work done and continue finding a cure!!!!
.
Some say that this happends because you have an unstable GPU, try to slow it down a bit and try again.... or change the motherboard PCIe interface to Version 2, you do it in the motherboard BIOS. That slows down the clock edges and makes the computer more stable than Ver 3.
Happy folding!!
You never know, you might depend on that simulation result any day!
// Aboy68
Links:
http://curecoin.net/index.php/knowledge-base/12-knowledge-base/folding-for-curecoin/32-can-i-calculate-or-verify-my-points-per-day 
