#53 Memory error?

[Anonymous]

An unexpected exception occoured: please send the text below to the developers of PyCAM. Thanks a lot!
Traceback (most recent call last):
File "/usr/lib/pymodules/python2.7/pycam/Gui/Project.py", line 4041, in generate_toolpath
self.model, toolpath_settings, callback=draw_callback)
File "/usr/lib/pymodules/python2.7/pycam/Toolpath/Generator.py", line 62, in generate_toolpath_from_settings
backend, callback)
File "/usr/lib/pymodules/python2.7/pycam/Toolpath/Generator.py", line 356, in generate_toolpath
toolpath = generator.GenerateToolPath(motion_grid, callback)
File "/usr/lib/pymodules/python2.7/pycam/PathGenerators/PushCutter.py", line 89, in GenerateToolPath
progress_counter)
File "/usr/lib/pymodules/python2.7/pycam/PathGenerators/PushCutter.py", line 144, in GenerateToolPathSlice
callback=progress_counter.update):
File "/usr/lib/pymodules/python2.7/pycam/Utils/threading.py", line 641, in run_in_parallel_local
pool = __multiprocessing.Pool(__num_of_processes)
File "/usr/lib/python2.7/multiprocessing/__init__.py", line 232, in Pool
return Pool(processes, initializer, initargs, maxtasksperchild)
File "/usr/lib/python2.7/multiprocessing/pool.py", line 136, in __init__
self._repopulate_pool()
File "/usr/lib/python2.7/multiprocessing/pool.py", line 199, in _repopulate_pool
w.start()
File "/usr/lib/python2.7/multiprocessing/process.py", line 130, in start
self._popen = Popen(self)
File "/usr/lib/python2.7/multiprocessing/forking.py", line 120, in __init__
self.pid = os.fork()
OSError: [Errno 12] Cannot allocate memory