I don't yet have Lightroom 4 installed, but I know how to get Lightroom 3 in and out of the mode you are now in.

Be in the Library module and select your MAIN folder in the Folders panel.  Go to the Library menu and choose

"Show Photos in Subfolders" to toggle that option on and off. I suspect right now it is turned off on our system.

I had the same problem. All I did was optimize catalog, restart lightroom and then restart the computer. After that all of the images come back in the main folder and are visible. Hope that helps.

I too am having this same issue.   I tried what selps03 recommended and still nothing.

Also, the main foilder that holds the physical files does not display what is in the sub folders.  If I go to each individual folder, it will show the data.   The "All Photographs" selection in the catalog shows the 29,000 number, which is correct, but does not show me the previews.

The other odd thing is that if I type in a keyword in the text filter box, I get image previews to display.

I got a solution, but do not know if it is optimal.

There seems to be a bug in the upgrade function.  If you let the Lightroom install do the catalog upgrade, no previews.

I went in, created a new catalog - then did LIBRARY --> Import from catalog...   and that seems to have worked.

Took quite a few minutes to get the 29000+ files moved over, but better than losing the catalog all together and having to rebuild it all.

I'm trying the import from previous catalog approach, after 8 hours now, I'm at 15k of 45k photos....It would be really nice to know what the issue is and whether there is a workaround that does not take hours to complete.  I have a very recent computer, i2700k, 16gb ram, plenty of disk space, nothing else running.  My photos are on multiple drives

I cancelled the reimport, deleted the catalogs.  Went back to open a new catalog from the old catalog.  The conversion takes place.  New catalog is slightly larger.  I tried re optimizing, but still left with "Click the import... button to begin".  So, I'm back at no usable catalog.  Please update with what you hear from Adobe.  I may have to call as well.

Update, I spent two hours on Chat with Adobe, let them take over driving, still same issue.  Final step before escalating to next level is they started the import from the old catalog again, so I'm back to waiting for that to finish.

Same problem.  I'm at just over 88,000 images.

Same problem here but I'm only at 45k images.  Adobe wanted me to import, but the import from catalog was taking way too long.  I am currently exporting my current catalog in smaller chunks.  I'm trying one at 5k and the second at 40k.  Once the export finishes, I will try and import from catalog on both of these.

I too had problem this morning with 73,000 photos. I use the 'All Photos" selection all the time especially when filtering. Reading these posts I started from scratch with a new catalog and an import from my last LR3 catalog. Yes, it took 6 hours, and YES IT IS FIXED. So, just do it. I was working on my PC doing spreadsheets, internet, e-mail etc the whole while, suffering through the mollases. But, everything is so sluggish, I think I'll still be running LR3 until the first LR4 update. Very dissapointing that the prerease testing did not elucidate fixes for these issues. But we need to betatest so that the CS6 release fares better!

What happens if - in the Library Module - you go >Library and check <Show photos in subfolders>?

Does that not show the photos in the parent folder? It did in Lr4 beta.

This item is worded confusingly. It should read: "Show photos that are in subfolders also in the parent folder."

WW

Web-Weaver, checking "Show photos in subfolders" does not solve the issue. 

Birder Frank, glad it worked for you.  I left my running all last night and only made it through 15k images. I canceled it this morning and called Adobe.  They started me doing in import from catalog again, but I canceled that as well.  I am currently exporting my current catalog in smaller chunks to see if that will resolve the issue.  First export 5800 images ran just fine.  Exporting the rest 39k went to 80% complete and then crashed LR3.  I'm now splitting up the remaining 39k into < 10k chunks, exporting those.  I'll reply again once I get exported.

Everything was there....flags, presets, key words, and collections.

That worked for everything BUT the All Photos top level selection.

Everything (including displaying all photos by selecting the root folder) is now working correctly for me. Here is what I did:

1) Told LR4 to create a new catalog

2) Opened the new catalog in LR4

3) File... Import from another catalog...

4) Pointed the import to a copy of my (non-converted) LR3 catalog

5) LR4 first converted the LR3 catalog to a temp LR4 catalog and then did the import

6) Total time to import 108,423 images (on a NAS box) was about 1.75 hours

7) At the end of the import process, LR4 threw an error message about an error importing the catalog. I dismissed the message and all appears to be fine. Everything works and all of my keywords etc are where they should be.

8) YMMV, but this is definitely worth a try for you guys.

That worked for me.  Thanks!

Cristian Samoila wrote:

 

There is a possible solution if nothing else works. In the old LR3 catalog select all the photos and write the metadata to files. Then reimport in a new LR4 catalog. There is the issue that you lose the history of edits but the files are imported. As far as I experienced, sometimes the catalogs become slightly corrupted and start to behave very strange but only when certain conditions are met.

This really isn't a solution. The problem is NOT that the new LR4 catalog that was created by converting the LR3 doesn't have the right photos. It does have the right photos!

The problem is that there is a bug in the way LR4 displays the photos in certain instances. Creating a new catalog by importing (in addition to the huge number of disadvantages that re-importing has) does nothing to eliminate the bug, and of course the same bug could affect the new LR4 catalog you spent so much time importing photos into.

Same issue here with 94'400 pictures. Issue though not with all subfolders. Assume it was based on a certain number of pictures in the (sub)folder.

Issue resolved:

> Created a new catalogue in LR4

> Importing the old LR3 catalogue

> Took estimated 40mins for 94k pictures

> Ignored the error warning after import was finalized

> seems as if everthing is perfectly fine, incl. all stars, tags, and other metadata not previously saved to pictures

> I will keep both, old LR3 and upgraded LR4 catalogues as backup (you never know)

Good look and have fun with LR4

Hi

I have a catalogue with 118000 and another one with 38000 and both work ok. I converted a third catalogue with just over 9000 and here the main directory and All Photographs display the correct count but no pictures

I have the same issue with about 120k pictures. I was able to create a new catalog and reimport the LR3 catalog but I lost all my publishing service setups and galleries which is unacceptable. How can Adobe not test this, this is not an isolated incident by the looks of things.

I did try to recreate the standard size previews and it appeared to work for a few folders but not others.

I also received the catalog conversion error at the end of the import but it didn't seem to impact anything.

Have Just got the result I want with a work around that I think someone else has suggested.

Let lr4 upgrade the lr3 catalog as per normal.

Then in lr4 create new catalog.

Then choose to import photos from existing catalogue with: FILE/Import from another catalog....

Choose the newly creat lr4 catalog from the previously upgrade LR4 catalogue.

Everything appears to be as it should be.