Lightroom Classic: v10 corrupts catalog in conversion

@bill_3305731

Thank you, but as noted above, he did that at least twice, and there is plenty of room on his 5TB hard drive.  He is on Windows 10. 

I always recommend to our clients to never allow their external HD to get more than 2/3 full.  I had him not only delete the Lightroom Classic 10 catalog, but the other folders associated with it (previews, etc.).  He then rebooted his computer.

Alas, deleting the new catalog, along with attendant folders (previews, etc) and rebooting the computer, then trying again has the same results.

Really stretching now: 

• have you copied his V9.4 catalog to your machine and then upgraded it to V10? The Lightroom catalog is a SQL database and it could have partial corruption that wouldn't show up until that part of the catalog was touched. The conversion touches the whole catalog. Converting it on your machine and then trying to use it should identify whether this is the problem. 
• plugins are causing V10 problems, are you both using the same ones? 
• see if the corrupted catalog can be copied to another drive, if successful, double click on it to see if Lightroom will open. The goal is to eliminate the external hard drive as the issue. 
• what video card is he using? If one of the MX series of Nvidia cards, turn it off in Windows not just in Lightroom. On 2 laptops (HP and Lenovo) with different MX cards, I had a whole raft of problems until I turned off these cards.
• are you both using Windows 10 with all the same/current updates?
• how do the hardware configurations compare? 

Interesting questions, but my husband's office is in the house, and mine is outside, and we should not have to troubleshoot in that manner.  
What if he were the only person asking this question, for example.

I actually have more plugins than he has.  He just has Digimarc, as do I, plus I have The Turning Gate and Jeffrey Friedl ones.

We'll try copying his catalog onto his computer and try from there.  We have Dell with Nvidia, so I can try that, too.

Yes, both on same version of Windows 10, and since the computers were bought at the same time, the configurations are the same.

You have given us a few options to try.  Thank you.

Sorry I can't give an exact answer but these types of problems are tough. It would sure be nice if someone (hello Adobe) would develop a catalog analysis tool, it would get lots of use. Those types of tools are hard to build so I don't expect one anytime soon. With DB2 (IBM's relational database) we had over a dozen analysis tools and that still didn't cover 100%. 

But to nail this, we need to find out what is different between your two systems. 

I'm retired so I've a lot of time to help you with this. So please don't hesitate to ask further questions. 

We will try it yet again!  I suspect he is destined to use the older version until Adobe comes up with a fix.  Even Victoria Bampton said there are known issues.