Crash NTDLL.dll

[AHunt]

I have Lightroom Classic 14.1 installed. Here is the system information:

• Lightroom Classic version: 14.0.1 [ 202410161356-30922cfc ]
• License: Creative Cloud
• Language setting: en
• Operating system: Windows 11 - Home Premium Edition
• Version: 11.0.22631
• Application architecture: x64
• System architecture: x64
• Logical processor count: 20
• Processor speed: 2.9GHz
• SqLite Version: 3.36.0
• CPU Utilisation: 0.0%
• Power Source: Plugged In
• Built-in memory: 65220.6 MB
• Dedicated GPU memory used by Lightroom: 159.1MB / 5996.0MB (2%)
• Real memory available to Lightroom: 65220.6 MB
• Real memory used by Lightroom: 3078.8 MB (4.7%)
• Virtual memory used by Lightroom: 3940.4 MB
• GDI objects count: 761
• USER objects count: 2344
• Process handles count: 6474
• Memory cache size: 78.0MB
• Internal Camera Raw version: 17.0 [ 2043 ]
• Maximum thread count used by Camera Raw: 5
• Camera Raw SIMD optimization: SSE2,AVX,AVX2
• Camera Raw virtual memory: 46MB / 32610MB (0%)
• Camera Raw real memory: -4073MB / 65220MB (-6%)

I installed Lightroom Classic 14 as soon as it was available and then installed 14.1 when it was available. Everything has worked fine until yesterday. LrC started "going away" after two or three minutes of use.  At first it sometimes would display the crash report dialog, but now it does not do that. Whenever given the chance I report the crash. I have tried the following:

• Rebooted my computer
• Tried with GPU both off and on in preferences.
• Reinstalled my graphics driver.
• Reinstalled LrC 13.5.1. It works fine with no issues.
• Reinstalled Lightroom Classic 14.1 and the crashes reoccur
• Deleted Lightroom Classic preferences and restarted Lightroom Classic, it still crashes

Every time this happens, the Windows Event viewer shows an "Application Error" with Task Category of "Application Crashing Events". I have attached a PDF with the details, When I saw this I started thinking maybe there was a Windows issue. I have followed the instructions to check the ntdll.dll file, but the LrC crash still occurs. I have checked and double checked the Windows Event Viewer and the only time I see this error is when Lightroom Classic crashes. Everything thing else I do on my computer works fine. 

Thanks,

Alan Hunt

[GoldingD]

Then I re-opened a folder that I remembered had ! exclamation marks on a bunch of photos. These photos said unable to save the metadata on the files, there was some sort of problem. I save my RAW photos as DNG and the save the metadata from Lightroom in the files, so I selected one of the photos and clicked [CTRL]S to save the metadata and see if the problem is resolved.

........

One very interesting thing:

If I disconnect the network and open Lightroom there are no crashes. I can be in Lightroom for a long time. No crash. No pause, no errors. But as soon as I plug in the network -- 10-30 seconds later Lightroom crashes.

By @gadgetgeek2000

Are any of those photos on the cloud or other network share?

[gadgetgeek2000]

yes, both. Some are synced to the Adobe cloud. Every photo I have is stored on network drive after initial import.

[gadgetgeek2000]

Adobe support says the problem is my catalog. I don't believe that is the case (although I can't quite rule it out yet). 

Adobe took my catalog, repaired it, and gave it back to me. I have been rebuilding the thumbnail previews for the library and the problem has returned.

I have discovered, however, that if I disconnect the network drive that holds all my photos when starting Lightroom there are no crashes. I can wait a bit and then reconnect the drive to keep working in the library and everything works. But Lightroom crashes with the ntdll.dll error if I have the network drive mapped when starting Lightroom. And by "crash" I mean "Lightroom just disappears and a crash is shown in my event log". There is never an option to send any sort of report to Adobe from this.

Hold the [ALT] on a PC when running the Lightroom shortcut to bring up the option to check/repair the catalog when starting. I do this occassionally, too.

I've reported that the repaired catalog did not fix my crashing issue back to my Adobe case.

Cloud sync disabled, all plugins removed. I do have my "lightroom settings" moved with each database move/change. That has been consistent all along. At one point, however, I think the preferences file was reset because my Grid view settings were reset back to vanilla install, and other Lightroom settings are not set.

[gadgetgeek2000]

I have performed Wireshark captures of traffic going to the NAS and noticed that there are some network packet retry/resend blocks during file copy and writing operations. When copying files from the NAS there are sometimes when the copy seems to be hung and then starts back up again. With this information I noticed that when the copy hangs my NAS is flashing lights on the SSD Cache drives that it uses to speed up the file transfers. I don’t have any errors in the console, and there are no other issues I’ve noticed to tell me there is problem on the nAS. However, I disabled the SSD cache and replaced these SSD cache drives, setting up a new cache.  File copy operations are much more fluid, without any pauses and resets.

I have been working in Lightroom since and haven’t noticed any crashes since. I don’t believe that Lightroom should outright crash with an NTDLL.DLL error when there is a “network retry” operation in the filesystem, but this might be the root cause of the issue. I will continue to work in Lightroom, save metadata to files on the NAS, copy files to and from the NAS, etc. to see if the issues have been resolved.