import Aperture to Lightroom classic fails with internal error

[dan-gra]

MBP OSX 10.15.3

LR Classic 9.2

Trying to import my old Aperture catalogue into LR classic but it fails every time with the error message "An internal errror has occured. ?:0: attempt to index a nil value.

I have actually had this problem for several years with older versions of LR and Mac OS. Since I could not get it solved back then, I patiently waited hoping the issue would magically be solved at some future revision. No other support references to this error code helped solve the issue. Since I have just upgraded to a new MBP 16" and am trying to consolidate and optimise my photo workflow on LR classic and LRCC, I thought it was time to solve this and import my old Aperture catalogue with 200gb of images. Here is what I have tried:
1. Import original 200gb Aperture catalogue = fail

2. Subdivide Aperture catalogue into 3 smaller parts from about 45gb to 90gb. = same failure

3. Remove LR preferences and allow new ones to be created. = fail

4. Optimise cataloge. also backup and optimise. = fail

5. Check permissions on files - all look correct - still fail

As I am now on OSX Catalina I can no longer open Aperture, so I am hoping that any solution does not require that!

Any ideas on how to solve this would be appreciated. Worse comes to worse, I will have to import the images all over and loose all my keywords and edits - obviously I would prefer not to have that happen!

Thanks

[GoldingD]

Do you happen to have a particular plug-in enabled. This one being Logitech Options? Known buggy plug-in that causes that exact error message, normally just annoying.

The Logitech Options is for use when you have one of those Logitech Mice or Keyboards that you can assign buttons/wheels to accomplish Lightroom shortcuts. not for normal mouse/keyboard use.

If you have it, disable it, test.

[GoldingD]

And check your plug-ins for issues, see if in plug-in manager, errors are presented.

[dan-gra]

Thanks for the suggestion. I had seen elsewhere that the Logitech plugin was an issue. I have assumed this was a LR specific plugin verses a system plugin - is that correct? If so, there is no logitech plugin listed in LR. The LR plugins listed are:

• AdobeStock
• Aperture/iPhone Importer Plig-in
• Facebook
• Flickr
• Nikon Tether Plugin

The only one I know I installed is the Nikon tether.

Should I disable all plug-ins except the Aperture importer and test?

[GoldingD]

Yep, you do not have that issue, too bad, easy fix.