Hi All
using Firebird 1.5

I change a column from type blop to type varchar.
Now, when I try to make an backup with GBAK I receive:

gbak: ERROR: conversion error from string "BLOB"
gbak: ERROR: gds_$receive failed
gbak: Exiting before completion due to errors

I made this change, because I received this error some time before
when i access this table via select ... group by statement.

Please help me how to repair this table without loosing any data.

Thanks in Advance