SAP Message >3015 - Specify a number from number range interval (&1, &2)

Diagnosis
You want to create a contract account with external number assignment.However, the number is not in the assigned number range interval (&V1&,V2).

Procedure
Enter a valid number.
If the number range interval has not been defined correctly, contactyour system administrator (number range object: &V4&, number range &V3&
)