 loaded to each node unnecessarily. Function <code>extract.fun</code> is provided to extract the functions and libraries needed, automatically called at each call of function <code>peperr</code>. Note that all required libraries have to be located in the standard library search path (obtained by <code><a href='https://rdrr.io/r/base/libPaths.html'>.libPaths()</a></code>). Another alternative is to load required data manually on the slaves, using <span class="pkg">snowfall</span> functions <code>sfLibrary</c