Errors not reported correctly in results.csv

[wfaught-vmware]

All I see in the results.csv error column is " Message: '' ". For example:

1273,260.942,1375823160,user_group-1,16.754579,Message: '' ,{'load': 1375823142.8310008, 'total': 2.2913360595703125, 'get': 1.105006217956543}

However, the exception is being printed in the shell. For example:

Exception in thread Thread-51:
Traceback (most recent call last):
File "/usr/lib64/python2.7/threading.py", line 552, in bootstrap_inner
self.run()
File "/devel/baas/tools/perf/selenium/env/src/multimechanize/multimechanize/core.py", line 98, in run
trans = self.script_module.Transaction()
File "/devel/baas/tools/perf/selenium/test_scripts/v_user.py", line 52, in __init
self._webdriver = Remote(self._service.service_url, _CAPABILITIES)
File "/devel/baas/tools/perf/selenium/env/lib/python2.7/site-packages/selenium/webdriver/remote/webdriver.py", line 72, in init
self.start_session(desired_capabilities, browser_profile)
File "/devel/baas/tools/perf/selenium/env/lib/python2.7/site-packages/selenium/webdriver/remote/webdriver.py", line 114, in start_session
'desiredCapabilities': desired_capabilities,
File "/devel/baas/tools/perf/selenium/env/lib/python2.7/site-packages/selenium/webdriver/remote/webdriver.py", line 165, in execute
self.error_handler.check_response(response)
File "/devel/baas/tools/perf/selenium/env/lib/python2.7/site-packages/selenium/webdriver/remote/errorhandler.py", line 164, in check_response
raise exception_class(message, screen, stacktrace)
WebDriverException: Message: u'Unable to either launch or connect to Chrome. Please check that ChromeDriver is up-to-date. Using Chrome binary at: /baasbuild/thirdparty/chrome/27.0.1453.15/bin/google-chrome'