I have seen such problems already, so it might be systematic, but I'm not sure what are the exact circumstances that trigger this problem. Try: make clean all in the Firedrake source directory. ________________________________ From: firedrake-bounces@imperial.ac.uk <firedrake-bounces@imperial.ac.uk> on behalf of Colin Cotter <colin.cotter@imperial.ac.uk> Sent: 25 June 2016 14:54:41 To: firedrake Subject: [firedrake] missing 'comm' Dear Firedrakers, Upon calling mesh = IcosahedralSphereMesh(1.0,3,2) I get an error, Traceback (most recent call last): File "dcmip_3-1_linear_advection_triangle_bdfm1.py", line 31, in <module> extrusion_type="radial") File "<decorator-gen-274>", line 2, in ExtrudedMesh File "/home/cjc1/firedrake-dev/firedrake/src/PyOP2/pyop2/profiling.py", line 59, in wrapper return f(*args, **kwargs) File "/home/cjc1/firedrake-dev/firedrake/src/firedrake/firedrake/mesh.py", line 1232, in ExtrudedMesh mesh.init() File "/home/cjc1/firedrake-dev/firedrake/src/firedrake/firedrake/mesh.py", line 831, in init self._callback(self) File "/home/cjc1/firedrake-dev/firedrake/src/firedrake/firedrake/mesh.py", line 1165, in callback self.topology.init() File "<decorator-gen-272>", line 2, in init File "/home/cjc1/firedrake-dev/firedrake/src/PyOP2/pyop2/profiling.py", line 59, in wrapper return f(*args, **kwargs) File "/home/cjc1/firedrake-dev/firedrake/src/firedrake/firedrake/mesh.py", line 407, in init self._callback(self) File "/home/cjc1/firedrake-dev/firedrake/src/firedrake/firedrake/mesh.py", line 375, in callback dmplex.mark_entity_classes(self._plex) File "firedrake/dmplex.pyx", line 632, in firedrake.dmplex.mark_entity_classes (firedrake/dmplex.c:9423) AttributeError: 'module' object has no attribute 'comm' Is this another petsc4py issue? cheers --cjc -- http://www.imperial.ac.uk/people/colin.cotter www.cambridge.org/9781107663916<http://www.cambridge.org/9781107663916> [http://assets.cambridge.org/97811076/63916/cover/9781107663916.jpg]