Merge pull request #1358 from polosecki/fix_write_dot

Fixed write_dot error for networkx>=1.11 in nipype/pipeline/utils.py

Author: chrisgorgo

nipype/pipeline/engine/utils.py

@@ -1021,7 +1021,7 @@ def export_graph(graph_in, base_dir=None, show=False, use_execgraph=False,
                                suffix='.dot',
                                use_ext=False,
                                newpath=base_dir)
-    nx.write_dot(pklgraph, outfname)
+    nx.drawing.nx_pydot.write_dot(pklgraph, outfname)
     logger.info('Creating dot file: %s' % outfname)
     cmd = 'dot -T%s -O %s' % (format, outfname)
     res = CommandLine(cmd, terminal_output='allatonce').run()