In T-code REBDRO, create one new Rental Unit, error message "Starting date of cash flow should be in validity period of object" will appear.
Reason and solution:
From the picture, the field "cash flow from" is suppressed. Please firstly un-suppress the field “cash flow from” for the Rental object in IMG setting in order to view the field value.
And the error just comes up if the field 'Cash Flow From' is filled, we will need to check the value of this field.
As soon as we do not enter any value here we won't get the error because the system then picks the object's validity date as cash flow
from date. However, this date is defaulted with the valid from date of the superior object. Check note 1089922 and 1081321 for reference.