- @prov_svg = ProvenanceHelper::create_provenance_graph u.provenance, "provenance_svg", {:direction => :bottom_up, :combine_jobs => :script_only}
- @used_by_svg = ProvenanceHelper::create_provenance_graph u.used_by, "used_by_svg", {:direction => :top_down, :combine_jobs => :script_only, :pdata_only => true}
+ @prov_svg = ProvenanceHelper::create_provenance_graph u.provenance, "provenance_svg", {:direction => :top_down, :combine_jobs => :script_only} rescue nil
+ @used_by_svg = ProvenanceHelper::create_provenance_graph u.used_by, "used_by_svg", {:direction => :top_down, :combine_jobs => :script_only, :pdata_only => true} rescue nil