Hi,
I ran your routine on my document and it put in a paragraph mark to break up large paragraphs into (<=300 characters in my version). It looks backward for the sentence mark. It mostly works except that once in a while it puts a bundle of empty paragraphs in the document for a couple of pages. I'm wondering if ypu know why. I'm trying to debug it now.
Thanks.
P.S. I noticed you did this a while ago so I hope you respond and I can send you the document.