Aperture 3.5 projects: Some are missing from Library listing

Question

I use Aperture 3.5.1 with OS 10.9.2, and I have studied the various pages of Aperture manuals, and read quite a few Questions, and I think I understand the difference between projects and albums and between managed and referenced files. But I am puzzled about a few project locations.
To the left of the Aperture display window is a vertical pane about 2 inches wide, with tabs labeled "Library, Info, Adjustments."
In that left-hand pane of the window, under the tab “Library” is a heading “APERETURE LIBRARY-MASTER”  and under that is the icon of “Projects”. When I select this, the right hand portion of the full window shows thumbnails representing of all my projects. These are organized by year and for each year, by date. This is the organization that Aperture did when I imported the photos, mostly from cameras. Fine.
In that left hand pan, under  the Library tab, further down, there is a heading “PROJECTS”. It shows a list of folders and albums and projects.
I see that in this library there are folders marked 2011 and 2012. In each of those there are folders for the months. In 2012 these include   “May”, “Jun UK", "Jun US", “Jul" and others. When I select any of these the associated thumbnails are all visible in the main display window to the right.
In the 2012 > Jun UK folder are 5 projects, with dated names such as "Jun 06, 2012 Chicheley". The word “Chicheley” and “UK" I added, but the rest of the structure 2012 > Jun was created by Aperture when I imported the photos.
However, and here is what puzzles me. In the thumbnail display to the right, of several hundred projects, there are 15 contiguous projects, all from June 2012,  that are not listed in the library panel  of projects in the Library tab pane at the left.
I can look at the “info” tab and see what the “Project Path” is for any photo. To judge by the badges, All of my photos are managed, not referenced.  Indeed, I cannot find any photos in my Aperture library that are referenced.
The projects that show up in the Library listing at the left pane have Project paths that start with a year, for example
2012 > Jun UK > Jun 06, 2012
The projects that do not show up in the Library listing have names such as
Jun UK Chicheley > Jun 05, 2012 Aston
At the top of the Library pane is a search box. It finds Jun 06 but not Jun 05.
I have looked inside the Aperture Library package and I see the organization there for the projects that show up in the library listing. But that is missing the days that are not in the listing — it is missing the projects that show up in the main window but not in the Library list..
Those thumbnailed of the missing projects are of photos that are not referenced, I have used the main menu at the top of the screen to check that.
I can edit all the photos, wherever they may be. No problem. But why do all the projects not show up in the library listing?  Where are they?
I have used EasyFind to search for a folder “Jun UK Chicheley”, allowing search in packages, but did not find it. Same problem with any of the other 15 projects that show up in PROJECTS  on the right, but not in the Library listing on the left.
I may have  imported the missing projects not from the camera but from a travel Aperture library, using the import library option.
Maybe I should select all of these photos and then do a “Consolidate”. I have read about this, in the Manual and in the Suppport questions,  but it is not clear whether that will do what I want. I see that Consolidate is something I can do for any of my photos, not just for those that are not shown in the library. So what happens with Consolidate of a photo that is already in the listing of projects? Should I choose “copy” or “move”? If I choose “move” then what happens to whatever collection these came from?
“Show in Project” and “Show in Finder” seem to be unavailable for all of my photos.
I will appreciate help.

Answer 1

What you're seeing when you try to view the original file is the warning that iPhoto had broken the file path/link to the orignal file.  Try this: make a temporary, backup copy of your library if you don't already have one (Control-click on the library and select Duplicate from the contextual menu) and  apply the two fixes below in order as needed:
Fix #1
Launch iPhoto with the Command+Option keys held down and rebuild the library.
Since only one option can be run at a time start with Option #1, followed by #3 and then #4 as needed.
Fix #2
Using iPhoto Library Manager  to Rebuild Your iPhoto Library
Download iPhoto Library Manager and launch.
Click on the Add Library button, navigate to your Home/Pictures folder and select your iPhoto Library folder.
Now that the library is listed in the left hand pane of iPLM, click on your library and go to the File ➙ Rebuild Library menu option
In the next  window name the new library and select the location you want it to be placed.
Click on the Create button.
Note: This creates a new library based on the LIbraryData.xml file in the library and will recover Events, Albums, keywords, titles and comments but not books, calendars or slideshows. The original library will be left untouched for further attempts at fixing the problem or in case the rebuilt library is not satisfactory.
OT