Diagnosis
The to-date may only be modified in a way that the values do not changeuntil the date &v1&. This date can be:

• End of the last billing period:

Maintenance of operand values is permitted in the current billing periodonly.

• End of the last backbilling period:

Maintenance of operand values is permitted in the current backbillingperiod only.

System Response

Procedure
Enter a to-date that fulfills the above-mentioned criteria.