The IES VA-Revit Link free utility provides BIM (Building Information Modeling) features, through the ability to merge or create .vap (VisualAnalysis) files from Autodesk Revit Structure. The link is bi-directional: the merge or create process can happen in either VisualAnalysis (.vap) or Revit (.rvt) files. VARevitLink runs as an add-in within Revit Structure, you do not need to have VisualAnalysis installed on the machine where you use this tool. Download this page from the IES web site.