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@@ -6,12 +6,22 @@ Most functions are however rather safe and should return an exception in the wra
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Note that even if the MvK crashes with such an error as mentioned below, this only breaks the violating task and all other tasks are left unharmed.
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As such, it is possible for a user to log in again on a different task, although there is no continuation.
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-TODO: body_id is None
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+body_id is None
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This error likely means that a function is called that was never defined: the declaration was found, but the definition is empty.
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-TODO: None has no length
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+None has no length
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Operations done on an error value, such as a dictionary read on a non-existing element
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+
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+pickle.PicklingError: Can't pickle <function X>
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+-----------------------------------------------
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+
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+The wrapper for manual activities relies on the multiprocessing library to spawn the various user-side interactions.
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+As such, the different functions are spawned in different Python processes, to allow for multiple such functions to execute simultaneously, as needed for process enactment.
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+While this allows for multiple such functions to execute simultaneously, as needed for process enactment, `this is not 100% supported in Python for Windows<https://docs.python.org/2/library/multiprocessing.html#windows>`_.
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+Your error is therefore likely caused by the multiprocessing library wanting to pass a function (or something else...), which it could not.
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+For example, it is not possible on Windows to give a local (nested) function as parameter to *transformation_execute_MANUAL*, as local functions cannot be pickled.
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+On Linux, that would work perfectly fine.
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