Unable to Export: An internal error has occured: ?:0: attempt to compare two nil values

[Andrei Dragusanu]

Hello,

I am trying to export a batch of photos (either by multiple selection -> right click -> export or by creating a Har Drive publish service) with the following settings:

• Resize to Fit:
  • Megapixels, 16,0 (or 15,0)
  • Resolution: 300 pixels per inch

At some point during the 'Preparing to export...' process I am getting the following error:

It appears that I am getting this error no mather what Megapixel value I insert. Any other resize method (dimensions, longe edge) or export to full size seem to work fine.

OS: Windows 10 Pro (1607)

Lightroom Version: 2015.7 Release

[Akash Sharma · Accepted solution]

Hi AndreiDragusanu,

Please refer these thread and let us know if that helps.

API error while exporting?

Update LR CC error message

If none of these helps,Restore Lightroom preferences after backing up your catalog.See Resetting Preferences in Lightroom CC/6

Regards,

Akash

[julib98550]

I have been receiving this same message when trying to export my finished images. I tried many of the fixes listed in these threads. However, in my case, it turned out to be the catalog that had a problem. I was able to export the images by creating a NEW CATALOG, then importing the images from the original catalog into it, to then export it. Hopefully my sharing this will help someone else. Here are the steps.

File > New Catalog > (name it) Create > the new catalog will then open...

File > Import From Another Catalog > (find original catalog) Double Click to open or click Choose > (check box) Import.
Once the images have completed the import, you may export as you normally would.