Hi,
I got this error while restoring an fb2 database on fb1.5 server.
Of course, I did first the bakcup on fb2 server with fb1.5 gbak.exe.

...
gbak: restoring index RDB$FOREIGN42
gbak: restoring index RDB$FOREIGN163
gbak: restoring index RDB$FOREIGN164
gbak: ERROR: invalid request BLR at offset 249
gbak: ERROR: data operation not supported
gbak: Exiting before completion due to errors

The same error occurs even with no-data database (gbak -m).
It seems like the error is caused by a particular metadata :
if so, how can I determine exactly witch one ?

thanks for any help