Elements 14.1: Panorama size limit - 'some images could not be automatically aligned'?

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I'm trying to make a panorama from seven landscape-format 20Mp files. Photomerge Panorama fails, claiming 'some images could not be automatically aligned'. I am able to make panoramas from frames 1 to 6 or 2 to 7 but not 1 to 7. I am confident the alignment is good as MS ICE stitches all seven together without problems but then Elements will not open the resulting file, whatever format I save it in. .JPG fails with 'problem parsing the JPEG data' while TIFF & PNG fail with 'problem with the file-format module interface'. Have I hit a limitation of horizontal resolution that's not failing gracefully or is it a deeper problem?

PC has 16GB RAM, W7Pro x64 and ample disk space.
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Jonathan Hurwitt

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Posted 2 years ago

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Kathleen Madeline

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You could try saving the two separate panoramas (merge layers first) and stitching them together.
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Kathleen Madeline

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Another thought is to resize (File>Process Multiple Files) all the photos first, keeping in mind the amount of overlap you have and how large you want the final pano to be.
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Jeffrey Tranberry, Sr. Product Manager, Digital Imaging

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The problem is more likely the content in Image 1 and Image 7 are too similar so it doesn't know which one to put at either end. You could try merging 1-3 and 4-7 and then merge the two results.
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Jonathan Hurwitt

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Thanks to both of you for the helpful suggestions. The end frames aren't at all similar to my eye as the land slopes gently upwards across the series. As suggested I created two separate panoramas from 1 to 4 and 5 to 7 and saved them as two (very large) PSDs. When I tried to merge these two files I got the same 'some images could not be automatically aligned' message. I then re-saved the files as TIFFs to cut the files sizes but got the same error when I tried to merge them.
A content problem also wouldn't explain Elements' refusal to open the panorama created in ICE. It's looking more and more to me like I've hit some sort of limitation. The file created by ICE is ~31300 pixels wide whereas the two 6-frame files are ~27000. I'd almost put money on something going wrong over 30000px.
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Jeffrey Tranberry, Sr. Product Manager, Digital Imaging

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Ahh, yes, there is a 30k on a side limit in Elements.
(Edited)
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Jonathan Hurwitt

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Thanks both. Presumably that's another differentiator between Elements and the full product? Fortunately, it's not something I'm likely to hit very often and, if I do, Kathy's suggestion of re-sizing sounds like the answer.
Although I do have to say that some work on the error messages would be helpful. I had a very long career in IT and I've seen far too many error messages that might have meant something to the developer but are gibberish to the end user.
(Edited)
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Steve Lehman

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As a Microsoft (mcse) network guy, this sounds like a memory problem.  Windows manages memory differently than Adobe which is limited in what it does with Windows.  It's not deep rooted.  Application makers are getting worse at their profession and then you cannot expect an app to work with Windows 100% of the time.  Adobe makes great image makers.  Not all of them understand Windows' Open Systems core, like an engineer at Microsoft.  Likewise, a Windows engineer can fail with Photoshop Elements.  Parsing the image in increments (as mentioned above) is better than repeating failed attempts.