2014-10-01 11:53:25 ERROR Zope.SiteErrorLog 1412117605.10.368634045524 http://example.com/lims/worksheets/WS14-015/manage_results
Traceback (innermost last):
  Module ZPublisher.Publish, line 138, in publish
  Module ZPublisher.mapply, line 77, in mapply
  Module ZPublisher.Publish, line 48, in call_object
  Module bika.lims.browser.worksheet, line 702, in __call__
  Module bika.lims.browser.worksheet, line 785, in checkInstrumentsValidity
  Module bika.lims.content.referenceanalysis, line 176, in isInstrumentValid
AttributeError: 'NoneType' object has no attribute 'getInstrumentEntryOfResults'
Traceback (most recent call last):
  File "/opt/plone/buildout-cache/eggs/Zope2-2.13.22-py2.7.egg/ZPublisher/Publish.py", line 138, in publish
    request, bind=1)
  File "/opt/plone/buildout-cache/eggs/Zope2-2.13.22-py2.7.egg/ZPublisher/mapply.py", line 77, in mapply
    if debug is not None: return debug(object,args,context)
  File "/opt/plone/buildout-cache/eggs/Zope2-2.13.22-py2.7.egg/ZPublisher/Publish.py", line 48, in call_object
    result=apply(object,args) # Type s<cr> to step into published object.
  File "/opt/plone/zinstance/src/bika.lims/bika/lims/browser/worksheet.py", line 702, in __call__
    self.checkInstrumentsValidity()
  File "/opt/plone/zinstance/src/bika.lims/bika/lims/browser/worksheet.py", line 785, in checkInstrumentsValidity
    valid = an.isInstrumentValid()
  File "/opt/plone/zinstance/src/bika.lims/bika/lims/content/referenceanalysis.py", line 176, in isInstrumentValid
    if self.getService().getInstrumentEntryOfResults() \
AttributeError: 'NoneType' object has no attribute 'getInstrumentEntryOfResults'