Rebate Agreement Detail – If you want to include attachments in the email sent to approvers, verify that the configuration option Disable Attachments is not enabled.
Rebate Calculations – Users are not allowed to delete the default Rebate Calculation (since it is necessary to have it for the Rebate Records Mass Submit action).
The Calculation tab also allows you to specify a 'logic', which would then be used to calculate the Rebate Records (instead of the logic set on the Condition Type). This is an option in advanced simulation scenarios where the Rebate Record calculation logic deviates too much from the regular accruals calculation logic.
Payout Records – Note that the 'payoutRecords' binding is only available from a Rebate Record calculation context, i.e., the logic that calculates rebate records in a Rebate Record Calculation task (one default task is created automatically for every Rebates module implementation).