6.	Set the Sequential Numbering System Profile Option: You or your System Administrator must enable sequential numbering for Cash Management. Use the System Profile Values window to set the Sequential Numbering profile option at the Application level. Choose Cash Management as the Application. Query the Sequential Numbering profile name. You can select from Always Used, Partially Used, or Not Used.

2. Yes, The code should be entered using CodeBuilder. Where you enter it depends on how and when you want to trigger the generation of the next number. If you want to use a button, that works. And no, you don’t use 000 in the NZ() function. If you want to DISPLAY at least 3 digits with leading zeros, then you do that in the Format function. Note, though, you will need to change that when you hit 1000 POs.
The main expressway system uses sequential numbering; Metropolitan Expressway systems also use sequential junction numbeing, usually appended with the expressway number expressed thus: 5-1; 5-2, etc. There are multiple toll expressways not operated by the major national syndicates or the Metropolitan Expressway Authorities that have no junction numbering scheme.

Hi reader in the U.S., we're interrupting your Wednesday evening because it's important. We need your help. It's a little awkward to ask, because we’re not salespeople. We’re librarians, archivists, and information junkies. We depend on donations averaging $16.36, but fewer than 1% of readers give. If you donate just $3, the price of your Wednesday coffee, Wikipedia could thrive. Thank you.
As I indicated, because you want to only generate this number just before saving, I would put this code behind a Save button or another event that runs just before you save the record. So if you want to prevent duplications, you don’t use the expression as a control source, but put the code behind a button or event. Since you have a Save button, put it there.
Sometimes, when the user has multiple PDF forms with numerous pages associated with them. Then it becomes difficult for the user to manage the forms in an efficient way. Moreover, it creates a problem for the user to recognize pages & PDF forms from which the pages belong. Thus, it is needed to add page numbers to PDF forms for the easy identification of the PDF forms and pages under them. document numbering