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How to tell if there is anything attached to the form

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Level 3

I need a script to let me know if any other documents/pictures/etc. are attached to the form.

I have a user who wants a message to appear "This form has items attached!" if anyone attaches documents to it. This way if they happen to not have the attachment window open, there is a visual telling them to check it.

I tried to do it simply, but it doesn't seem to be working at all. I created a blank text input field, and put the following on the calculate event:

var myDoc = event.target;

var d = myDoc.dataObjects; //get the attachments

if (d.length >= 0) { //if the length of the attachments is greater than or equal to zero then

        this.rawValue = "This document has attachments!"; //display message in text input field

}

This doesn't display anything at all in my field. I'm drawing a blank and I can't seem to find much reference on the properties of attachments.

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