Incremental Process Data for Drivers in Predictive Cash Forecasting

As part of Predictive Cash Forecast Admin guide, it has been mentioned as 'Periodic Incremental Process Data For Drivers' rule needs to be added to integration use to load drivers assumption data. This will help in creating a optimized business rule based on loaded combination.

However, when we have created a Integration to load assumption data and used single driver method as part of file, the attached rule is not generating any script for same.

Please let me know if there is anyone who has used this functionality available with OOB module and if there is any specific file format needs to be used?