Lightroom CC 2015.5/6.5: Can't merge to HDR from collapsed stacks.

This should be fixed in the Lightroom CC 2015.5.1/6.5.1 update that was released today: http://blogs.adobe.com/lightroomjournal/2016/04/lightroom-cc-2015-5-1-now-available.html

This is a bug.  I had the same issue and found the same work around.  I spent 2 hours on the phone with tech support debugging the new release and then getting the previous version of Lightroom installed.  You can do it yourself.  First, uninstall the app.  To install the earlier version, here's the link:  http://prodesigntools.com/adobe-cc-2015-updates-links-mac.html  — scroll down to the lightroom links.  You'll have to start with: version 6.01 and then install each update all the way up to version 6.4.  Do this at your own risk.  You can also contact Adobe and have them do it for you if you're not comfortable doing it: 800-833-6687

Thanks for the reply. I don't want to go through the hassle of downgrading so I'll cross my fingers and hope they fix it soon. Something always breaks with their updates it seems... 

A workaround to the bug that will save a few keystrokes: Shift-click on the stack badge in the upper-left corner of the thumbnail -- that will expand the stack and select all of its photos. Then do Ctrl+Shift+H.

Thanks for bringing this to our attention. I am able to reproduce the issue and have filed a bug report to have it fixed.

This reply was created from a merged topic originally titled Selecting stack only selects the first image.

I've run into a problem with stacking in my 2015.5 release Lightroom CC software.

Before I grouped images into stacks and then selected the stack to combine into HDR or Panorama. Somehow that got broken, probably in the last update.

I now have to open the stack and manually select all the images I want to combine before combining them. That's a lot of extra work when I do this a lot.

Is this a problem with Lightroom CC 2015.5 or is it just on my end?

This reply was created from a merged topic originally titled Lightroom CC 2015.5 panorama merge of stack fails.

Before 2015.5 it was possible to merge (panorama or HDR) photos by selecting a collapsed stack.
In 2015.5 you have to expand and select all images, otherwise the merge results in the somewhat unhelpful message "Unknown errors occurred."

This reply was created from a merged topic originally titled LIGHTROOM: Error during stacked HDR merge.

Every time I try to do an HDR merge on a stack, I receive a message "an internal error has occurred." However this issue does not show up when I merge unstacked images. 

This problem only started with the latest Lightroom update. I am not the only one experiencing this issue, however I cannot find any solution to this bug.

Please fix! This is slowing down my work flow!

The fix for this issue will be available in the next release of Lightroom.

Thank you! Great response!