Perform the migration to Ariba Buyer 8.1 according to the instructions given in the Ariba Buyer Migration Guide Version 8.1.
After launching the migrationHarness utility, run tasks 0 through 26 only. Do this by issuing the command:
rr 0-26
The remaining Ariba Buyer integration tasks will be done after you have run the integration channel migration utility (see Completing the Buyer migration tasks).