Seems some kind of network drop:
2013-06-14T14:11:37.849-04:00 [03664 info 'Default'] Sysimgbase_DiskLib_Read failed with 'The specified network name is no longer available' (error code:4194313)
2013-06-14T14:11:38.849-04:00 [03664 info 'Default'] Sysimgbase_DiskLib_Read failed with 'An unexpected network error occurred' (error code:3866633)
Look at zip-in-zip but not the UI 
Try the conversion again... HTH