If you search this support thread you will find some hints and insight into what causes this.. This page is one that might help..

http://www.zen-cart.com/forum/showth...+link&page=576

Quote Originally Posted by artcoder View Post
IH2 working fine on Zencart version 1.3.9h. Except when I tried to upload an additional image using the IH2 Manager -> Add New. I selected an image from my computer and when I click "save", it gave me this error ...

"Error!
Unable to determine the page link!
Function used:
zen_href_link('', '', 'NONSSL')
"