For me whenever I am rendering one of Howies scenes and I have made changes to it then I will get a 'Mem Allocation Error', but I found a little work around it, so if I will save a New File, that is to maybe add a 1,2,3 or A,B,C to the backside of Howies Scene File Name, then I can render without Error at all and I have rendered a 7500x5625 pixel at 300 DPI for printing and hanging on the wall ;^D
Tyr It, it may help!!!

I would rather be Politically Incorrect,
Then have Politically Correct-Incorrectness!!!