HMM motion correction fails on Windows 10 with n_processes > 1

[hluetck]

Hello,
I seem to be able to run HMM motion correction with several processes on OS X but not Windows 10. This is the code I am using (based on the provided example data):

sequences = [sima.Sequence.create('TIFF', 'example_Ch1.tif')]
mc_approach = sima.motion.HiddenMarkov2D(granularity='row', max_displacement=[20, 30], verbose=False, n_processes=2)
dataset = mc_approach.correct(sequences, 'example_mc.sima')

This runs fine with 2 cores on my MacBook but produces an error on a Windows 10 machine with 2 cores. I pasted the error here. Has anyone encountered this problem before?

Thanks, Henry