Thanks for that info.
Yes, this XML file is from a WordPress site. It is not an XML export from Events Calendar.. Instead there is a custom post-type in my theme called ‘Events’. I’ve exported content from only this post type.
The link you sent talks about exporting typical Events Calendar info, so not helpful in this case.
What other options do I have to break this massive XML file down into manageable chunks? Can I send the file to someone to look at?