Multiterm Error Message

Hi, 

I am trying to convert an excel glossary in Multiterm. I have converted my terms successfully in Multiterm Convert but then when I go through to Multiterm Desktop to create a new termbase I am receiving an error message at the end which says...

Object reference not set as instance of an object

Has anyone had this error message before as I am stuck and am not sure what to do next? 

Many thanks, 

Ella