Render server error

An error occurred on the render server: RuntimeError: RuntimeError: command failed with returncode 256: ['mw-zip', '-o', '/home/pp/cache/bf/bfd71f541d33b51b/collection.zip', '-m', '/home/pp/cache/bf/bfd71f541d33b51b/metabook.json', '--status', 'qserve://localhost:14311/bfd71f541d33b51b:makezip'] Last Output: 1% creating nuwiki in u'/home/pp/cache/bf/bfd71f541d33b51b/tmpEzQFGE/nuwiki' removing tmpdir u'/home/pp/cache/bf/bfd71f541d33b51b/tmpEzQFGE' memory used: res=16.0 virt=91.6 1% error Traceback (most recent call last): File "/home/pp/local/bin/mw-zip", line 37, in <module> sys.exit(mwlib.apps.buildzip.main()) File "/home/pp/.buildout/cache/eggs/mwlib-0.15.14-py2.7-linux-x86_64.egg/mwlib/apps/buildzip.py", line 155, in main make_zip(output, options, env.metabook, podclient=podclient, status=status) File "/home/pp/.buildout/cache/eggs/mwlib-0.15.14-py2.7-linux-x86_64.egg/mwlib/apps/buildzip.py", line 50, in make_zip make_nuwiki(fsdir, metabook=metabook, options=options, podclient=podclient, status=status) File "/home/pp/.buildout/cache/eggs/mwlib-0.15.14-py2.7-linux-x86_64.egg/mwlib/apps/make_nuwiki.py", line 151, in make_nuwiki assert x.wikiident in id2wiki, "no wikiconf for %r (%s)" % (x.wikiident, x) AssertionError: no wikiconf for None (<article {'_env': <mwlib.wiki.Environment object at 0x2c3ff90>, 'content_type': u'text/x-wiki', 'title': u'Xnat:Web', 'timestamp': u'1398413785', 'type': 'article', 'revision': u'347'}>) in function system, file /home/pp/.buildout/cache/eggs/mwlib-0.15.14-py2.7-linux-x86_64.egg/mwlib/nslave.py, line 64 in function qaddw, file /home/pp/.buildout/cache/eggs/qserve-0.2.8-py2.7.egg/qs/slave.py, line 66

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