""didiergm"" <Didiergm@...> wrote in message
news:a6nmuj+f7fa@......

>
> Note: this DB is under heavy development, that could be a reason. May
> be I should backup & restore in a fresh db just to check.=20

You'll have to check.
Metadata alterations are a can of worms for now. They have been since v4.
Worse, Borland practiced copy/paste of long code fragments in the metadata
alteration module, so one fix should be applied twice or thrice in most
cases.

C.
--
Claudio Valderrama C. - http://www.cvalde.com - http://www.firebirdSql.org
Independent developer
Owner of the Interbase® WebRing