Memory problems with Xpose

Hi, I am trying to plot model parameters vs. covariates suing Xpose. The data file is rather large and I get the following message: In initialize(value, ...) : Reached total allocation of 1535Mb: see help(memory.size) 2: In initialize(value, ...) : Reached total allocation of 1535Mb: see help(memory.size) Error in print(parm.vs.cov(.cur.db)) : error in evaluating the argument 'x' in selecting a method for function 'print': Error: cannot allocate vector of size 171 Kb Can anybody offer a remedy? Thanks! Toufigh