Using Text codes

From the No. Series form, click the Series button and select Lines. In there you add a line with "A/January/0001" as the starting number, "A/January/9999" as the ending number, and January 1 as the starting date. Then you enter a new line with "A/February/0001" as the starting number, "A/February/9999" as the ending number, and february 1 as the starting date. Repeat for the other months. I did something similar for a company that wanted a new series for each day. You could even write a processing only report to populate those lines.

One little piece of advice though.... try to advise your customer to not use 'smart' order numbers. In the end, this is much more maintenance than it is worth. There are fields on the order header tables that you can use for filtering, grouping, etc. by using strong types field values, instead of concatenating the numbers and assigning meaningful values to bits of the order number.

personally I think Daniel is right. Maintaining this # series of a long period of time will be a pain.

It would be easier to create your code using
%1 – The current day number
%2 – The current week number
%3 – The current month number
%4 – The current month name
%5 – The current accounting period name

in a Reference field, external doc field or PO field or where ever you are using this.

*if you are going to use month name cut it into the first 3 letters so it looks more uniform

MonthName := FORMAT(TODAY,0,'<Month Text,3><Year>');
* this will give you
JAN07
FEB07
MAR07
etc....

adding <Day> give you day - see FORMAT in c/Side Help