Rupert Essinger, I know this is a thread from 2011 but its the only information I've come across so far about the same problem. I've using ArcGIS for desktop, 10.2 and having the exact same problem as described here. Online in my browser I'm able to open a map without issue and show it on the online map viewer, but selecting Open in ArcGIS for Desktop downloads a item.pkinfo file which I am unable to do anything with. Have I made some sort of mistake here or is there still a compatibility issue here?
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