Splitting a multipage document into 1 page each file?

I think you should consider to do it in Acrobat. There it is 1 single command to extract each page from any PDF as separate document.

Looks like those scripts were broken when the forums migrated. The main culprit is the loss of iterators, ie:

for (var i = 0; i < myPages.length; i++) {

   var myPages = myPages;

}

In the above instance, we're missing [i] after myPages. The first full script looks like it should work, but it has several instances where the iterator is missing. Don't have the time to fix it, but perhaps you can. Otherwise it looks like it should work in theory.