When printing multiple sheets to either plotter or PDF, you get the following error: “Revit could not start the print job because it was unable to connect to the specified printer..”
This is a known issue with Windows Security Update KB3177725 and has been acknowledged by Microsoft.
“After you apply this security update and you print multiple documents in succession, the first two documents may print successfully. However, the third and subsequent documents may not print.”
The good thing is that there IS a fix for this. Simply uninstall the update and wait for Microsoft to release an update that fixes this issue.
The BIM Avenger's Blog 