All mine 4GB AMD rigs stop working last night.

not enough GPU memory to place DAG, you cannot mine this coin with this GPU
12.0 miner, -Eres 0 dont help, more that 32 GB of virtual mem dont help...
Win 10 1803
Faced with a similar problem, a farm of 6 RX 580 nitro +
She stopped working on New Year's Eve at 3 o'clock in Moscow
Same problem here, I reported it a few weeks ago, v12 fixed it temporary.
But for me it is not all my
4g rigs, most are working, and I cant find any difference between the working and not working once.
They are all win10 beta blockhain drivers, only like 20% are givin'g
dag epoch error not enough memory on GPU.
The working once I have benched to dag #299 no problem... wtf lol
I found the solution it is something we all know but forget, that it resets itself sometimes.