Which version of Lightroom are you using?
Make sure you are using Correct catalog.(Check this from File>>Open Recent
If so,You need to locate the missing Pictures/Folder.
Let us know if that helps
I am using the latest Lightroom CC version 2015.2.1 release
I am not sure what you mean if I am using the correct catalog. Its the only catalogue in this computer.
The problem is not that I have picture files that are missing from the previews (quite common when the folder or source files have been moved), but the other way around. I have more than 800 raw and dng files in the folder and only 190 of them show up inside LR
When I as to import them LR says that they have already been imported but they do not show up....
Are there any solutions to this issue? I have the same with LR 6.6.1 (or at least very similar). I have 952 files in the folder but only 941 showing in the catalog. In the bottomline LR even tells me that 941 of 952 pictures are shown.
Trying to synchronize, no new pictures are found.
Trying to import the folder claims that all 952 pictures are alread present and no new files are to import.
Cross checking with a simple picture viewer all 952 pictures are present and readable.
For me it seem to happen while stacking (grouping) the pictures. Afterwards they were disappearing.
Note: Naturally I turned all filters off for viewing the catalogue.
Searching for one of the missing pictures using the file name yealds no result.