Auto numbering every time a fillable pdf form opens and saves a file with the new number each time

[kevinj33320872]

I am trying to generating automatic numbering for a file each time it opens starting from 000501 then getting it to save the form after completion on exit. I enterred the code below:

if (this.documentFileName == "TFMC Work Order Form.pdf")

if (global.count == null) //checks to see if count exists

{

global.count = 000501 //sets initial count, you can change to suite your needs

global.setPersistent("count",true) //makes the counter a global object so it is persistent data

}

else

global.count++ //increments the the counter by one when the document is opened

var f = this.getField("Order Number").value = Number(this.getField("Order Number").valueAsString)+1; //creates a variable for the form field where the counter will be displayed

f.value = global.count //sets the form field to equal the counter

but it doesn't generate the number even if I start the field area with 501, howver if I go into prepare form the number sometimes runs a counter in the field 4, or 5. Auto generating only when I go into prepare form  not always, only sometimes. 

Can you assist?

[Bernd Alheit]

Where does you use the script?

[kevinj33320872]

 used the script in the javascript secion under tools.

[try67]

This line doesn't make sense:

var f = this.getField("Order Number").value = Number(this.getField("Order Number").valueAsString)+1;

Especially not when followed by this:

f.value = global.count

Do you want to increment the value of the field by one, or set it to the value of the global counter?

[kevinj33320872]

I want to set the value of the inital counter as 501 then increment it by one every time it is opened.

[try67]

Replace the last part of the code with just this:

this.getField("Order Number").value = global.count;

[kevinj33320872]

It still doesn't generate properly. It shows a numder then on occasion after several openings, that's when a new numbe displays.