Thread:Talk:Semantic Bundle/Storing data imported using External Data with Semantic Internal Objects - "Class SMW\SubobjectParser not found"

I'm using External Data to grab data from an SQL database - displaying the data using External Data's  call works perfectly, and I can display the data in a table. Setup is Mediawiki 1.21.1, PHP 5.4.8, MySQL 5.5.28. However, I'd like to display the data in a chart using Semantic Mediawiki's Jqplotchart, so I have to store the data using Semantic Internal Objects, via External Data's  function. When I try to use this function to recreate the simple example here, the table is not displayed and I get the following errors in my wiki debug log: Looking into this a bit further, I can see from online documentation that the SubobjectParser class is defined in a file that is missing in the Semantic Mediawiki package I have (version 1.8.0.4), and also seems to be missing in the latest development code on GitHub (there is however a SubobjectParserFunction file). Any idea on how I can get this working?
 * Class SMW\SubobjectParser not found; skipped loading
 * Class SMW\Subobject not found; skipped loading