Lightroom 6 panorama function on a mac, works fine the first time. when trying a two photo pano for a second time, the pano dialog comes up, but hangs.
If you exit lightroom, and restart it, it will work exactly one more time.
I haven't experienced that problem. What operating system? How much RAM? A few details about your system might help.
27" Mac, 10.10.3, 20GB ram,
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