random forest using party package

Hi all,
I am trying out with random forest on party package but am getting an error
saying : cannot allocate vector of size 564." What would be the problem? the
coding as below:

data.controls <- cforest_unbiased(ntree=1000, mtry=3)
data.cforest <- cforest(class ~x1+x2+x3, data = Score,
controls=data.controls)

Error: cannot allocate vector of size 564 Kb
my datasets is of  10 independent variables and 72,000 entries.
what should I proceed?



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