when sorting using <...tal:repeat subsection python:sequence.sort(subsections,(('title','nocase','asc'),))">

 

I get the following error:

 

Module DocumentTemplate.sequence.SortEx, line 134 in nocase

AttributeError: 'NoneType' has no attribute 'lower'

 

When I switch the 'nocase' to 'cmp' the sort defaults to sorting by order of entry or something.

 

Any help would be greatly appreciated.

 

Thanks.