hi,

* using which version of VDB?

* You should do clone of this db, using e.g. Valentina Studio

* maybe you can tell where from this db? ADK app? under vserver? vstudio?
how old big this db is?

1) This is under Server 5.8.8, Realbasic 2011r4 (yes I know it's old)
The db is relatively big : 60 tables where 2 tables have 500 000 records each, but the corrupted one has only 90 000
The db is in 4 files : vdb (795 ko), dat (410 Mo), ind (116 Mo), bob (5 Mo)
Not encounter this problem with the ADK/standalone version of my software.

2) I do a clone to solve this, but I would know if it exists some other method that take less time to complete.

3) I'm really interested to know how I can avoid / prevent / workaround this problem because I encounter this corruption several time now (different customers) and sometimes some time after the db clone (thus 2 or 3 times with the same db)