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

The backup/restore procedure ends normally but the problem is still present.

The problem is most likely in Application Objects which is corrupted in one way or the other.

The table definitions are stored in RDRR but the Document information (Forms, Reports, Procedures, Menus) are stored in Application Objects which is really just a normal DataEase table/form.

It is possible to edit data in Application Objects but you need to be careful.

You can send it to us, and we can try to fix it for you but we will have to charge for the time spent.