X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/0eb72b526bf8bbb011551ecf019f604e17a534f1..a9a202895a63f29e8bc045c50f5518800b008275:/apps/workbench/app/helpers/provenance_helper.rb

diff --git a/apps/workbench/app/helpers/provenance_helper.rb b/apps/workbench/app/helpers/provenance_helper.rb
index 94092a12ea..9b4d265dfa 100644
--- a/apps/workbench/app/helpers/provenance_helper.rb
+++ b/apps/workbench/app/helpers/provenance_helper.rb
@@ -232,7 +232,11 @@ module ProvenanceHelper
                   # Search for any collection with this PDH
                   cols = @opts[:input_collections][pdh]
                 end
-                names = cols.collect{|x| x[:name]}.uniq
+                if cols
+                  names = cols.collect{|x| x[:name]}.uniq
+                else
+                  names = ['(collection not found)']
+                end
                 input_name = names.first
                 if names.length > 1
                   input_name += " + #{names.length - 1} more"