Migrating MySQL5 database to Oracle 10g - table with blob data fails

During data migration phase from MySQL5 to Oracle, noticed that the tables that have record length greater than 64K fails. It just says FINISHED for those tables without migrating any data. This is specially happening in the tables that have text and blob columns with data more than 20Meg in the blob fields.
Is this a bug? If not is ther any configuration file to increase the record size? Does it use SQL*Loader underneath to transfer the data or some other mechanism?

Thanks Spain, but using Offline scripts does not work for me as my record length is around 28MB and SQL*loader allows maximum record length of 20MB.
Is there any way to dump just the blob column data out of MySQL into a separate file?

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Migrating MySQL5 database to Oracle 10g - table with blob data fails

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