vConverter : "unknown exception"

Hi,
  I have problems with vConverter VMware.
  When I want to virtualize a physical machine in VMware Infrastructure, the task failed at 1%.
  And the error message is: "An unknown exception"
  And attached is the log of the task of virtualization.

 

  For information,  vConverter running win2008 R2 with the firewall deactivated

 

   I hope to have an  answer.