Thank you Hayo.
My replies:
The first screenshot is from the root of the drive called "TNF SEL Multiple", it contains 242 file, correct?
Correct but not really at the root drive: it's an HDisk ( iMac HD***) in my iMac where the system is on an SSD. And the file "TNF SEL Multiple" is relatively deep into the folders tree, at the fith level in the tree of that HD.
The second screenshot is from a directory called "TNF SEL Multiple" inside the directory where you placed your PM+ catalog, it contains 607 files/directories, correct? The directory from the second screenshot is where you copied your image files to place them inside the catalog. Still correct?
Correct, it's the catalog folder of PM6+ I've never touched via the finder. It's PM6+ that had built it. I've never move any file in the catalog folder which is located on the same HD iMac***, but more close to the root (second level of the tree).
I'm just switching from Media pro and I know that, if I can manually move files via the finder from a folder to another, I never be allowed to modify the Media pro folder (there are not catalogs but it's certainly the same).
I believe your way to correct my catalog is the right one, and I'll do as you advocate it. Thank you anew.
My problem is more that it seems to me that PM6+ had corrupted his data bank and so that it could happen anew. This catalog is simple, so built it anew is not a real problem. But with a larger catalog, rebuilding it would take largely more time.
But I'm still in confidence with PM6+ ;~)