Issue Client cannot enter new invoice, credit memo, etc. because receiving no. series error message.

Message:
You cannot assign new numbers from the number series ###.
Solution
 Number series quoted in message had reached its maximum. Client was directed to insert new line in number series table.

Steps:

Financial Management > Setup > No. Series > select number series quoted in message
Series button > Lines > enter new line 

Starting Date = Work Date
Starting No. = one number higher Last No. Used in previous line (ie. 1000)
Ending No. = approximate end of range (ie. 1999)
Last Date Used = blank
Last No. Used = blank
Warning No. = approximately 10 less than Ending No. or as preferred (ie. 1989)
Increment No. = same as previous line (ie. 1)
Open = flagged (check mark)