Python rpy2 and matplotlib conflict when using multiprocessing

Question

I am trying to calculate and generate plots using multiprocessing. On Linux the code below runs correctly, however on the Mac (ML) it doesn\'t, giving the error below:

Answer 1

I had a similar issue and found that setting the start method in multiprocessing to use forkserver works as long as it comes after your if name == main: statement.

if __name__ == '__main__':
    multiprocessing.set_start_method('forkserver')
    first_process = multiprocessing.Process(target = targetOne)
    second_process = multiprocessing.Process(target = targetTwo)
    first_process.start()
    second_process.start()