Nero Video Premium HD Error occurred during export process

Hi Experts,
As usual i am back with more issues. I love the way techyv Experts give answers here.
I am using Nero Video premium HD to work on pictures to produce picture effects. Recently, while trying to export the file to an external USB hard drive, I received the error message “Error occurred during export process". I have also tried saving the file to a local drive. But that doesn’t work either.
How can I get this fixed?
