IOError: [Errno 13] Permission denied. Компилятор FEniCS JIT

Я продолжаю получать ошибку отказа в разрешении: IOError: [Errno 13] Permission denied , когда я пытаюсь запустить создание пространства функций.

Я думаю, это как-то связано с JIT-компилятором. Каким-то образом вся компиляция выполняется в корневом каталоге, и когда он пытается прочитать, в разрешении отказывается.

Вот журнал полученной мной ошибки:

lento@lento-VPCF11C5E:~/Documents/Thesis/programs/navierstokes$ python test_navierStokes.py 
Traceback (most recent call last):
  File "test_navierStokes.py", line 104, in <module>
    N=np.array([nx,ny]))
  File "/home/lento/Documents/Thesis/programs/navierstokes/navierStokes.py", line 145, in __init__
    self._nu,self._cfl,self._uMax)
  File "/home/lento/Documents/Thesis/programs/navierstokes/base/ipcs.py", line 129, in __init__
    super(ipcs,self).__init__(mesh,boundaryDomains,nu,cfl,uMax)
  File "/home/lento/Documents/Thesis/programs/navierstokes/base/solverBase.py", line 68, in __init__
    self.boundary_DOFCoordinates, self.boundary_VectorDOFIndex = boundary.locate_boundaryDOFs(self.mesh,self.boundaryDomains,3)     
  File "/home/lento/Documents/Thesis/programs/navierstokes/base/boundary.py", line 125, in locate_boundaryDOFs
    V = dolfin.FunctionSpace(mesh, "CG", p)
  File "/usr/lib/python2.7/dist-packages/dolfin/functions/functionspace.py", line 403, in __init__
    FunctionSpaceBase.__init__(self, mesh, element, constrained_domain)
  File "/usr/lib/python2.7/dist-packages/dolfin/functions/functionspace.py", line 84, in __init__
    ufc_element, ufc_dofmap = jit(self._ufl_element)
  File "/usr/lib/python2.7/dist-packages/dolfin/compilemodules/jit.py", line 60, in mpi_jit
    return local_jit(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/dolfin/compilemodules/jit.py", line 122, in jit
    return jit_compile(form, parameters=p, common_cell=common_cell)
  File "/usr/lib/python2.7/dist-packages/ffc/jitcompiler.py", line 76, in jit
    return jit_element(ufl_object, parameters)
  File "/usr/lib/python2.7/dist-packages/ffc/jitcompiler.py", line 252, in jit_element
    compiled_form, module, form_data, prefix = jit_form(form, parameters)
  File "/usr/lib/python2.7/dist-packages/ffc/jitcompiler.py", line 179, in jit_form
    module = instant.import_module(module_name, cache_dir=cache_dir)
  File "/usr/lib/python2.7/dist-packages/instant/cache.py", line 156, in import_module
    return check_disk_cache(modulename, cache_dir, moduleids)
  File "/usr/lib/python2.7/dist-packages/instant/cache.py", line 113, in check_disk_cache
    lock = get_lock(cache_dir, modulename)
  File "/usr/lib/python2.7/dist-packages/instant/locking.py", line 81, in get_lock
    lock = open(os.path.join(cache_dir, lockname), "w")
IOError: [Errno 13] Permission denied: '/home/lento/.instant/cache/ffc_form_3d305e9085738f267ea73581b5f0769fda1e332d.lock'