Comment 4 for bug 510834

This looks to me like a regression of bug https://bugs.launchpad.net/openobject-server/+bug/392480 ? Depending on the rml I think the test for 'None' on the n.getparent() calls.

We got a very similar error, which we were able to work around with:

--- bin/report/preprocess.py 2010-04-23 14:12:24 +0000
+++ bin/report/preprocess.py 2010-07-20 10:31:51 +0000
@@ -19,6 +19,8 @@
                 def _sub3(txt):
                     n = node
                     while n.tag != txt.group(2):
+ if n.getparent() is None:
+ break
                         n = n.getparent()
                     n.set('rml_tag

I suspect this bug can be worked around in the same manner