montage-ufmf non-fatal error message

[fieldbio]

When montage-ufmf finishes running it exits with this error message:

Closing remaining open files: /home/flightlab/Desktop/1/1/DATA20100218_142912.3D_orientation.kh5-smoothcache... done 1/DATA20100218_142912.3D_orientation.h5... done
Exception AttributeError: AttributeError("'NoneType' object has no attribute 'ref'",) in <bound method CachingAnalyzer.del of <flydra.a2.core_analysis.CachingAnalyzer instance at 0x4adcb48>> ignored
Exception TypeError: 'must be type, not None' in ignored

But the video turns out fine so this is not really an urgent issue.

[astraw]

I can't reproduce the exceptions, either with the master branch or the paolo branch. Can you upload some files that will allow me to reproduce it?