If you experience issues during the migration process, go to the Support page at Support Zone or contact Greenplum customer support at one of the following numbers:
United States: 800-782-4362 (1-800-SVC-4EMC)
Be prepared to provide the following information:
1) A completed Upgrade Procedure.
2) Log output from gpmigrator and gpcheckcat (located in ~/gpAdminLogs)