You may experience unusually long processing times when exporting a VIM file from Revit. Large VIM files (7GB+) should only take approximately 1 hour to export. If your export is taking a significantly longer time, follow the steps below.
Close Autodesk Revit and any associated Autodesk applications that are not running.
Navigate to your Windows user Temp folder (replace <user> with your user name):
c:\Users\<user>\AppData\Local\TempDelete the contents of the Temp directory.
You might be prompted to skip some files that are being used by other applications.Reboot your computer.
Export the VIM file again.