Paleolithic question : I went from Photoshop Elements 1 to 12 !

Question

Hello,
I went from Photoshop Elements 1 with a MacOS 9 Imac to Photoshop Elements 12 with a Macbook under Maveriks.
Some images made with Photoshop Elements 1 does not open in Photoshop Elements 12. images taken one month apart there several years may or may not open.
In "Get Info" from the Macbook, the system nevertheless recognizes these images as type "Adobe Photoshop Elements file". 
But in the "More info" Macbook, those which open in Photoshop Elements 12 displayed: Dimensions: 591x886 / Space color: RGB / Alpha Channel: No / Opening: yesterday. 
Those that do not open with Photoshop Elements 12 displayed nothing (only the opening time).
How to open these photos which are nevertheless in .psd format ? 
Thank you in advance for any information,
Michel

Answer 1

1) In the Finder Get Info dialog under General, is there a size listed
for the images that won't open in pse 12?
Yes, I have a size listed for the images that won't open in pse 12,
about 2,5 Mo, below info "Type" : Adobe Photoshop Elements file.
2) Did you recently copy the images from os 9 or were they stored on an
cd/dvd or external drive?
I transferred all my documents to an external disk "Aluslim 2.5",
FireWire 400 and USB 2.0, format : "Mac OS Extended"
On the external drive Aluslim (where I kept the photos of trasfert) I
find the same corrupt files: In "Get Info" from the Macbook, the system
recognizes all images as "Adobe Photoshop Elements file". But in the
"More info" Macbook, those that open in PSE12 displayed: Dimensions:
591x886 / Space color: RGB / Alpha Channel: No / Opening: yesterday.
Those that do not open with PSE12 display nothing (only opening time)
Le 13/02/2015 23:40, R_Kelly a écrit :
      Paleolithic question : I went from Photoshop Elements 1 to 12 !
created by R_Kelly <https://forums.adobe.com/people/R_Kelly> in
/Photoshop Elements/ - View the full discussion
<https://forums.adobe.com/message/7192995#7192995>