From my reading of the docs, "multisession" is supposed to work on Windows, but not "multicore". For cross-platform coding, one can use the "multiprocess" optio

From my reading of the docs, "multisession" is supposed to work on Windows, but not "multicore". For cross-platform coding, one can use the "multiprocess" option, which results in multicore on platforms that support it, and multisession otherwise.