[R] Memory problem

[Bayesianbay@aol.com]

Dear list

I am running a data simulation, which is needed to simulate up to a million 
pieces of data.

I am getting the following memory error :

Error: cannot allocate vector of size 11 Kb
In addition: Warning message: 
Reached total allocation of 255Mb: see help(memory.size) 

I am running a PC with 256Mb RAM and R seems to be taking up the entire 
allocation and is still not able to do the simulation.
Could anybody tell me how much RAM is needed for this sort of process and if 
there is any way of allocating more memory to R.

Many thanks
Laura
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