Fix regressions
Merge pull request #2738 from ke-yu/fix_regressions

Fix regressions
Clear warning
Add regression test case
Merge pull request #2742 from ke-yu/fix_warning_issue

Fix issue that runtime warnign not cleared
Merge branch 'master' into Revit2015
Merge pull request #2743 from ke-yu/Revit2015

Cross merge changes to Revit2015