On Tue, Sep 20, 2011 at 13:14, majstor <majstoru@...> wrote:

> Hi Firebird Masters,
>
> Does anybody know an ideal tool for transfering data from Firebird database ver 2.1.x UNICODE_FSS to 2.5 UTF8, I'll try a lot of free or demo tools but same error with malware string are there. I just don't know how to solve this problem...

"The database migration process might require some special steps. If
the database restore fails with the error "malformed string" for you,
please pay attention to the files in the /misc/upgrade/metadata
directory of your installation and use the new -fix_fss_data and
-fix_fss_metadata command line switches of GBAK."
quoted from:
http://www.ib-aid.com/articles/item118

Read the docs mentioned above (/misc/upgrade/metadata).
Here's a usage example (I didn't try it, just googled for fix_fss_data):
http://tech.groups.yahoo.com/group/firebird-support/message/110416

HTH,
Markus