Com operation Failed

Hi there,
I've been trying to export an AAF of my project using the PRO TOOLS format and AVID AAF but the export always ends with this message: COM Operation failed HRESULT 0. All the media exported but the AAF file seems to be empty.
Does anyone know what it means?
Appreciate any input on that,
Thank you very much,
Gisela
I've been trying to export an AAF of my project using the PRO TOOLS format and AVID AAF but the export always ends with this message: COM Operation failed HRESULT 0. All the media exported but the AAF file seems to be empty.
Does anyone know what it means?
Appreciate any input on that,
Thank you very much,
Gisela