This hotfix improves two areas:
• Poor performance with Revit Server due to excessive calls to locateModel logic.
• Inability to save models to Revit Server 2014 due to a condition where “An item with the same key has already been added.”
Note: You must apply the most recent update to a Revit 2014 product, Revit 2014 Update Release 2, before attempting to apply this hotfix. Both Revit Server 2014 and Revit 2014 need to be updated with this hotfix.