Hi, It seems that Rscript creates a temporary file to store the commands passed with the -e option, under normal circumstances the temp file gets deleted at some point. Here is an example of a call I use: q:/R/R-2.6.1/bin/Rscript.exe -e ".libPaths(\"q:/R/vogranovich/library\"); params <- list(a=1); source(foo)" The temp files seem to be a problem when multiple jobs are run simultaneously. I suspect that when two Rscripts are run at almost the same time they try to create the same tepm file and clash over it, which causes one or both of them to die. Is my guesswork corect? If yes, is there a way to avoid the clash, say by specifying which directory to use for temp files? Thanks, Vadim [[alternative HTML version deleted]]