Dataloader Error "IMIMEHeaderParser.CreateInstance 80040154 Class not registered" (4312537)

Journal mailbox is not being processed. The Dataloader log contains the following
11:59:16 DEBUG: BEGIN Run()
11:59:16 DEBUG: BEGIN RunningWalk()
11:59:16 DEBUG: Memory Usage: WorkingSet=4980K,PeakWorkingSet=4980K,PageFaults=1277,PageFileUsage=1752K,PeakPageFileUsage=1752K,PrivateUsage=1752K
11:59:16 ERROR: IMIMEHeaderParser.CreateInstance:
11:59:16 [80040154] Class not registered
11:59:16 Statistics for this run
11:59:16 _____________________________________
11:59:16 Folders processed : 0
11:59:16 Messages processed : 0 (0 linked)
11:59:16 Attachments processed : 0
11:59:16 Errors : 1
11:59:16 Warnings : 0
11:59:16 Mailbox export complete.