Error -1701

I am constantly getting -1701 error while trying to insert a new citation. I am working with Word on Mac 2011.  Can anyone suggest me solution?

searching the forum, came up with this

http://community.thomsonreuters.com/t5/EndNote-General/Endnote-X7-No-longer-communicating-with-Word/m-p/127033#M23802

Are you running both 2016 and 2011?  

I have solved my problem just closing the Word 2016 window.

I found the solution on the site onwebtools.com