Sitecore Packager throwing System.IO.IOException: The file exists.
[IOException: The file exists.] System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath) +2056933 System.IO.__Error.WinIOError() +30 System.IO.Path.GetTempFileName() +2715024 Sitecore.Shell.Applications.Install.Commands.BuildPackageCommand.Execute(CommandContext context) +106
And so on. So looking at this, turns out the packager isn't really to blame here. Except maybe for the fact that it should have cought this exception and given a better error message :P
Looking into my C:\WINDOWS\TEMP folder revealed:
And further looking at MSDN reveals:
The GetTempFileName method will raise an IOException if it is used to create more than 65535 files without deleting previous temporary files.
The GetTempFileName method will raise an IOException if no unique temporary file name is available. To resolve this error, delete all unneeded temporary files.
A bit of housekeeping, and voila
All good again :-)