Converter task fails at 1% with an error FAILED: A file I/O error occurred while accessing ''.

Hi,

I am trying to convert a windows 2012 R2 system to a VM and using VMware converter. but the task fails at 1% with an error A file I/O error occurred while accessing ''.   

please find the screenshot of the error.

I tried on more than 1 server and recieve the same error for both

Any ideas?

Thanks,

Kiran