At 08:15 AM 16-07-01 +0000, you wrote:

>Hi!
>
>I have the following problem:
>
>I got a Interbase DB created with Interbase 4.2 (ODS 8.2), which might
>already be corrumpted (I don't know for sure and now I don't have the
>original anymore).
>
>After that I opened it with IBConsole and Interbase 6.01 but only for
>reading the structure.
>
>Afterwards I wanted to do some changes (dropping a constraint) by
>using Interbase 4.2, which returned me the following error message:
>
>invalid request BLR at offset 0
> -corrupt system table
> -unsupported BLR version (expected 4, encountered 5)
>
>I was then only able to do backup with IB 6.01 and will now try to
>restore it with IB 4.2 ...
>
>Can someone tell me the relation between BLR version and Interbase
>version? Is it possible, that this error occured because I opened the
>database with IB 6.01?

Oh dear, yes. Too late now - but you should have used gbak in v.4 to create a backup (gbk) file, which then you should have restored as a v.6 gdb file, using the v.6 gbak program, before trying to open it as v.6.

Can you not get the old 4.2 database again?

rgds

Helen


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