"Schema %s was not found."
*Cause: If exporting or importing over the network, either the user
specified a schema name that was not found in the source database
or else the user lacked the proper EXP_FULL_DATABASE or
IMP_FULL_DATABASE role that would allow them to access another
schema. For importing from files, the user specified a schema
name not found in the dump file set.
*Action: Retry the operation using the correct schema name.