ORA-00223: convert file is invalid or incorrect
version.
Cause: An Oracle7 to Oracle8 convert file contains invalid data or was
created with an different version of the migration utility. This error can also
be caused by incorrect ORACLE_HOME environment variable when ALTER DATABASE
CONVERT command is issued.
Action: Use a correct version of the convert file or regenerate it with
the migration utility. Make sure that the migration utility is the same version
as the Oracle8 RDBMS executable and that the ORACLE_HOME environment variable
is properly set.