QuickTime Pro 7 Export Failed qtKitErrorCatchAll (-49)

I'm trying to do some converting of Webex WRF recordings over to QuickTime for loading onto a Citrix GoToWebinar account. Process takes three passes and is as follows:

- WRF to WMV on Windows (that's all WebEx provides)

- WMW to MP4 on Windows (can't convert WMVs on a Mac for free)

- MP4 to MOV with QuickTime on a Mac for Citrix upload (have to use QuickTime Pro 7 because of output options)

The Citrix support .MOV format must be H.264, AAC, Hinted Streaming to upload properly. Some files have converted alright, but now I'm getting the error above in the subject.

Any help? Thanks

Eric