I had some trouble with using "copy in sharepoint" action.
This item works fine when I copy the list item attachment to another list item when there is aleady attachments.
For example, when I copy to following url and there is already listB/attachment/11 folder in server, It works.
http://XXX/sites/samplesite/lists/listB/attachments/11
However, If there are no attachment history in the listB 11 item, the copy in sharepoint action shows following error.
Failed to copy item. Cannot find list at url http://XXX/sites/samplesite/lists/listB/attachments/11.
I checked Create folder structure option in the copy in sharepoint action. However It seems it doen't help because it is related to subfolder copy not to the destination folder existence.
Please Help Me :-)