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nzphotomike
Participant
August 6, 2022
Question

Lightroom Classic fails to upload book to Blurb

  • August 6, 2022
  • 2 replies
  • 478 views

Hi community

 

Has anyone come across the issue when uploading a book from Lightroom Classic  to blurb where it immediately fails when trying to upload? It goes through all of the 'rendering pages' steps, but fails immediately when it starts to upload the cover. It produces a very generic programming language error:

 

An internal error has occurred

?:0:  attempt to perform arithmetic on filed 'chunk_size' (a nil value)

 

I've seen 'workarounds' exporting to PDF and then sending to Blurb, but it's not really a workaround but rather simply not using the integrated upload feature. Uploading the PDF to Blurb seems to work okay, even if it does complain that the page size is slightly different (which it is able to auto-correct during the web upload process)

 

Lightroom version: 11.4.1

Mac OS: Big Sur 11.6.8

 

Thanks

Michael

 

2 replies

Participant
October 2, 2025

Mine will not upload anything and no error message. Blurb is blaming Lightroom, saying it's a bug. I have tried all of their work arouns suggestions. It will make a PDF but not upload any of the book at all.

 

Rikk Flohr_Photography
Community Manager
October 2, 2025

You’ve posted to an ancient thread. It is highly unlikely that the issue described in this thread, though not impossible, is the same one you are currently experiencing. Rather than resurrect an old thread that is seemingly similar, you are better off posting to a new thread with fresh, complete information, including system information, a complete description of the problem, and step-by-step instructions for reproduction. 

 

If the issue is the same, we will merge you back into the appropriate location. 

This thread will be locked. 

 

Thank you!

 

Rikk Flohr: Adobe Photography Org
TheDigitalDog
Inspiring
August 7, 2022

Appears to be some kind of Lua error from what I can find. 

Try resetting your Lightroom preferences, can't hurt:
https://helpx.adobe.com/lightroom-classic/help/setting-preferences-lightroom.html
Also see: https://community.adobe.com/t5/lightroom-classic-discussions/important-steps-for-manually-resetting-preferences-omitted-from-help-article/td-p/12972518

Quit Lightroom Classic.
MacOS: Press and hold the Shift + Option keys.
Windows: Press and hold the Shift + Alt keys.
While holding down the keys, launch Lightroom Classic.
When asked, select "Yes". 

If that doesn't work, maybe try uninstalling LR using Adobe Creative Cloud, and then use it to reinstall LR. 

Author “Color Management for Photographers" & "Photoshop CC Color Management/pluralsight"