OpenStudio BCL Roof Insulation Measure Error

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In OpenStudio, I downloaded the BCL measure "Set Exterior Roof Assembly to User Input U Value". However, when I try to run the BCL measure on my model, I get the following error message. It doesn't appear to be unique to any specific model, as even when I try to run this measure on a DOE Prototype building I get the same error message. Does anyone have any idea as to what the problem may be? I am using version 2.9.1

Error: undefined method ‘-‘ for nil:NilClass
C:/Users/canjewierden/BCL/dbcf7b67-274b-4bc0-9153-e4c3e2885aa1/1f76bbda-1df1-4769-a843-09faefcb9b4a/measure.rb:224:in ‘block in run’
C:/Users/canjewierden/BCL/dbcf7b67-274b-4bc0-9153-e4c3e2885aa1/1f76bbda-1df1-4769-a843-09faefcb9b4a/measure.rb:224:in ‘each’
C:/Users/canjewierden/BCL/dbcf7b67-274b-4bc0-9153-e4c3e2885aa1/1f76bbda-1df1-4769-a843-09faefcb9b4a/measure.rb:224:in ‘run’
:/ruby/2.2.0/gems/openstudio-workflow-1.3.4/lib/openstudio/workflow/util/measure.rb:502:in ‘apply_measure’
:/ruby/2.2.0/gems/openstudio-workflow-1.3.4/lib/openstudio/workflow/util/measure.rb:109:in ‘block in apply_measures’
:/ruby/2.2.0/gems/openstudio-workflow-1.3.4/lib/openstudio/workflow/util/measure.rb:67:in ‘each_index’
:/ruby/2.2.0/gems/openstudio-workflow-1.3.4/lib/openstudio/workflow/util/measure.rb:67:in ‘appply_measures’
:/ruby/2.2.0/gems/openstudio-workflow-1.3.4/lib/openstudio/workflow/jobs/run_os_measures.rb:68:in ‘perform’
:/ruby/2.2.0/gems/openstudio-workflow-1.3.4/lib/openstudio/workflow/run.rb:285:in ‘step’
:/ruby/2.2.0/gems/openstudio-workflow-1.3.4/lib/openstudio/workflow/run.rb:232:in ‘run’
:/openstudio_cli.rb:975:in ‘execute’
:/openstudio_cli.rb:763:in ‘execute’
:/openstudio_cli.rb:1746:in ‘’
eval:116:in ‘eval’
eval:116:in ‘require_embedded_absolute’
eval:101:in ‘block in require’
eval:95:in ‘each’
eval:95:in ‘require’
eval:3:in ‘’