diff --git a/pfft/core.pyx b/pfft/core.pyx
index 7bb6262..8da50ee 100644
--- a/pfft/core.pyx
+++ b/pfft/core.pyx
@@ -376,26 +376,31 @@ cdef class ProcMesh(object):
                 else:
                     raise ValueError("only comm=MPI.COMM_WORLD is supported, "
                             + " update mpi4py to 2.0, with MPI._addressof")
+        else:
+            raise TypeError("comm is not a MPI.Comm")
+
         self.comm = comm
 
         self.rank = comm.rank
 
-        cdef int [::1] np_ = numpy.array(np, 'int32')
+        cdef int [::1] np_
+        np_ = numpy.array(np, 'int32')
+        self.np = numpy.array(np_)
+
         rt = pfft_create_procmesh(np_.shape[0], ccomm, &np_[0], &self.ccart)
 
         if rt != 0:
             self.ccart = NULL
             raise RuntimeError("Failed to create proc mesh")
 
-        self.np = numpy.array(np_)
         self.ndim = len(self.np)
 
         # a buffer used for various purposes 
-        cdef int[::1] junk = numpy.empty(self.ndim, 'int32')
+        cdef int[::1] junk = numpy.empty_like(np_)
 
         # now fill `this'
-        self.this = numpy.array(np, 'int32')
-        cMPI.MPI_Cart_get(self.ccart, 2, 
+        self.this = numpy.array(np_, 'int32')
+        cMPI.MPI_Cart_get(self.ccart, len(self.this), 
                 &junk[0], &junk[0],
                 <int*>self.this.data);
 
@@ -482,13 +487,14 @@ cdef class Partition(object):
 
         local_ni, local_no, local_i_start, local_o_start = numpy.empty((4, n_.shape[0]), 'intp')
 
-        if len(n_) <= len(procmesh.np):
+        if (len(n_) > 1 and len(n_) <= len(procmesh.np)) \
+        or (len(n_) == 1 and len(procmesh.np) > 1):
             raise ValueError("ProcMesh (%d) shall have less dimentions than Mesh (%d)" % (len(procmesh.np), len(n_)))
 
         self.type = Type(type)
         self.flags = Flags(flags)
         cdef pfft_local_size_func func = PFFT_LOCAL_SIZE_FUNC[self.type]
-
+        print(numpy.array(n_), procmesh.np, procmesh.ndim)
 
         rt = func(n_.shape[0], 
                 &n_[0], 
diff --git a/pfft/tests/test_pfft.py b/pfft/tests/test_pfft.py
index 75c7a5f..20fbd74 100644
--- a/pfft/tests/test_pfft.py
+++ b/pfft/tests/test_pfft.py
@@ -8,6 +8,7 @@
 from mpi4py_test import MPIWorld
 
 from mpi4py import MPI
+
 def test_world():
     world = MPI.COMM_WORLD
 
@@ -19,6 +20,15 @@ def test_world():
     assert_array_equal(pfft.ProcMesh.split(2, None), pfft.ProcMesh.split(2, world))
     assert_array_equal(pfft.ProcMesh.split(1, None), pfft.ProcMesh.split(1, world))
 
+@MPIWorld(NTask=1)
+def test_1d(comm):
+    procmesh = pfft.ProcMesh(np=[comm.size,], comm=comm)
+    partition = pfft.Partition(pfft.Type.PFFT_C2C,
+            [4], procmesh,
+            pfft.Flags.PFFT_TRANSPOSED_OUT)
+
+    assert_array_equal(partition.i_edges[0], [0])
+
 @MPIWorld(NTask=3, required=3, optional=True)
 def test_edges(comm):
     procmesh = pfft.ProcMesh(np=[comm.size,], comm=comm)
diff --git a/pfft/version.py b/pfft/version.py
index 4274e06..0c5c300 100644
--- a/pfft/version.py
+++ b/pfft/version.py
@@ -1 +1 @@
-__version__ = "0.1.11dev0"
+__version__ = "0.1.11"