InfoPath Dev

I want to know how to make an expression that counts how many attachments the user has put on the form, so that, before I submit it, I can use a rule to stop, if the count of attachments is fewer than I want. Is this possible?

Is the attachment in a repeating group or repeating itself? If so, you can just use the count function...

No, it's just the default "click here to attach a file" thing.

Oh, is this a list form? Sorry, trying to understand your data source.

Yes - sorry. My entire knowledge is comprised of this context so I forget to specify it. I created a List, then used "customized in infopath". using sp 2010 and infopath 2013.

count(/dfs:myFields/dfs:dataFields/my:SharePointListItem_RW/my:Attachments/attachmentURL) should do the trick.... If you look at your datasource in "advanced" view, you'll see attachmentURL is repeating.

Wow, that worked perfectly! Thank you so much. I had tried to use a similar but slightly different expression I found elsewhere and it did not work. Thanks again!