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Can anyone help with this - I have been running glmer code for linear mixed models on my works pc, and am now working on my laptop (which is vista) and when I load the lme4 package i get the message below and I cannot run any models - any one have any ideas? Emma trying URL 'http://cran.uk.r-project.org/bin/windows/contrib/2.8/Matrix_0.999375-21.zip' Error in download.file(url,