@AbHazim
it doesn't have to be antivirus (u should consider using one though), it is something which is infuriating Revit from writing/accessing the shared location where data is brig saved... It can be any of the following reasons
- Windows Firewall
- 3rd party Firewall
- A change to/in windows UAC
- lost connection to LAN/WAN server/accelerator or NAS
- lost connection to Internet while collaborating on A360
for us to be able to help u or give you specific suggestions you need to be more specific on the kind of setup u have, which revit r u using and which build, what were you doing when error occurred (working locally or on a network)
- Do you have all service packs / updates for revit installed?
- Did you recently update windows?
- go to Revit Application menu >> Options (or alternatively in the revit.ini) and check the path set for default saving of documents...make sure you have the right access to that folder.
- shut down revit then restart by right click on desktop icon and run as administrator
