The list of the object seems corrupted and/or incompleted only using the menu File>Open, but if I use directly the catalog all the object are listed correctly and works fine. 

I tried to:

- Refresh the database (via Application>Status>Refresh)

- Reorganize all system tables

- Backup the application and restore (but the restore procedure aborted)

- Migrate the database (34,2 GB !) in higher next versions (7.2 or 8)  but the error is also replicated on these versions.

At the moment I don't have any other solution. 

Have you an idea about?

Please see the figures below

Figure 1 - The catalog seems empty

Figure 2 - If I try to scroll down the menu,  the list of the obects is incomplete (the list ends at the letter D)

Figure 3 The catalog list is correct