Opening Archived email attachment results in HTTP 500 Internal Server error (4328976)

Cannot able to open any archived attachment and an error 500 is seen.

Below error is seen in the Event Viewer logs

2015-08-13 16:12:57,176 [24] ERROR WWW.ViewAttachmentController - {{880d1e16-38c7-4557-830d-5deb311280a3}} Error has been handled
System.IO.IOException: The file exists.

at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.__Error.WinIOError()
at System.IO.Path.InternalGetTempFileName(Boolean checkHost)
at Dell.AM.SL2.Core.StreamOnFile.WriteStreamToTempFile(Stream stream)
at Dell.AM.SL2.Core.StreamOnFile.GetOwnedPathForStream(Stream stream)
at Dell.AM.BusinessLayer.AttachmentFile.GetAttachmentPath(CacheMode cacheMode)
at Dell.AM.BusinessLayer.AttachmentFile.GetAttachmentPath(Guid checkSum, Boolean mustExist, CacheMode cacheMode)
at Dell.AM.BL.UAC.Attachments.SelectStreamByCheckSum(Actor actor, Guid attachmentCheckSum, Int32 instanceId, String impersonate)
at Dell.AM.Website.ViewAttachmentViewModel.get_AttachmentStream()
at Dell.AM.Website.ViewAttachmentViewModel.CanConvertOle()
at Dell.AM.Website.ViewAttachmentController.DownloadFile(String method, String fileName, Boolean convertOle, Boolean noCacheExists, String serverProtocol, HttpResponse response)