Here's the issue I'm having with loading in a duration with TMX Importer. Below is an example CAPX that replicates the issue for me at least.
https://www.dropbox.com/s/p6juar9klxrb4z5/messedup.capx
It tells me:
Javascript error!
Uncaught TypeError: Cannot read property 'name' of undefined
localhost/Rex_TMXImporter_plugin.js, line 458 (col
undefined)