i don't think you're problem is a render problem, but a log4r problem.
from logger.rb
# Add outputters by name or by reference. Can be done any time. def add(*_outputters) for thing in _outputters o = (thing.kind_of?(Outputter) ? thing : Outputter[thing]) # some basic validation if not o.kind_of?(Outputter) raise TypeError, "Expected kind of Outputter, got #{o.class}", caller elsif o.nil? raise TypeError, "Couldn't find Outputter '#{thing}'", caller end @outputters.push o Logger.log_internal {"Added outputter '#{o.name}' to '#{@fullname}'"} end @outputters end
the first line in that method is what is causing the error.
Chris