I was getting that same message UNTIL I got this version of VERTMINER and added 8gb to my rig. Problem solved
I suspect that the problem wasn't the lack of RAM in your machine, but the older cgminer you were running. Vertminer occupies very little RAM if you check it out when it's active.
See the thing is I was skeptical like you. People were saying you need 4gb ram... 4gb ram.. and when I look at how much ram I was using the miner showed no difference. So it seemed like non-sense. So eventually after I tried everything possible I gave in and tried adding more ram (not expecting it to work). I upgraded from 2gb to 8gb. Then everything suddenly worked.... Intesity could go above -I 12, TC at 8193. Even if I look at how much ram Im using right now it says 15% usage (not much right?), so idk why more ram was necessary but it worked.
I dont quiet understand why it worked but I'm just going by what worked and what people said would work. THEY WERE RIGHT
My guess is that the vertcoin algorithm allocates memory differently which is what makes is asic resistant.