ArraynYes, At least one contact pair has no elements in it error is difficult to find the offending contact pair. I have struggled with that but ultimately figured it out with some help.nIn your post with the zip file, you have put only the .wbpj file which is useless without the accompanying _files folder of the same name. Use File, Archive to create a .wbpz file which holds both and can be directly attached to posts.n