A client using CSV Importer reported getting this error.
Mapper did not return result for unexpected reason. Please send a copy of this report to [collectionspace@lyrasis.org](mailto:collectionspace@lyrasis.org). We will use the following info to diagnose and fix the problem, but you may ignore it: undefined method `<=' for nil:NilClass -- /usr/local/bundle/bundler/gems/collectionspace-mapper-dba3fc46d869/lib/collectionspace/mapper/data_mapper.rb:265:in `group_accommodates_subgroup?'
Client data in failing rows had:
value: nil,
measurementunit: nil
This resulted in an empty dimensionSubGroup hash being passed into DataMapper.map_subgroup as thisdata.
Kind of surprising this is the first time anybody has reported this problem!