Couldn't Import Episode, Invalid handle to path ""

Hi guys,

I’ve got a weird problem. Get the following error, but not on everything, just on one series at the moment (Breaking Bad). Not sure what’s happening, every other show is working just fine…

System.IO.IOException: Invalid handle to path ""
at System.IO.File.Move (System.String sourceFileName, System.String destFileName) [0x00000] in <filename unknown>:0 
at NzbDrone.Common.Disk.DiskProviderBase.MoveFile (System.String source, System.String destination) [0x00000] in <filename unknown>:0 
at NzbDrone.Core.MediaFiles.EpisodeFileMovingService.MoveFile (NzbDrone.Core.MediaFiles.EpisodeFile episodeFile, NzbDrone.Core.Tv.Series series, System.Collections.Generic.List`1 episodes, System.String destinationFilename) [0x00000] in <filename unknown>:0 
at NzbDrone.Core.MediaFiles.EpisodeFileMovingService.MoveEpisodeFile (NzbDrone.Core.MediaFiles.EpisodeFile episodeFile, NzbDrone.Core.Parser.Model.LocalEpisode localEpisode) [0x00000] in <filename unknown>:0 
at NzbDrone.Core.MediaFiles.UpgradeMediaFileService.UpgradeEpisodeFile (NzbDrone.Core.MediaFiles.EpisodeFile episodeFile, NzbDrone.Core.Parser.Model.LocalEpisode localEpisode) [0x00000] in <filename unknown>:0 
at NzbDrone.Core.MediaFiles.EpisodeImport.ImportApprovedEpisodes.Import (System.Collections.Generic.List`1 decisions, Boolean newDownload) [0x00000] in <filename unknown>:0 

Debug logs (https://github.com/NzbDrone/NzbDrone/wiki/Log-Files) and running mono with the --debug switch will be required in hunting this down.