Here’s a demo of the above problem: Archive 2.zip (36.4 KB)
The Zip contains a small test TBX, and its HTML export in folder ‘image-test’. In the additional folder ‘image-test2’ I have manually made a new folder 'test_agent_ and copied images there to illustrate the fix suggested up-thread.
For my 2¢-worth, if exporting to HTML is (a part of) your end point, don’t waste your time embedding images because it seems easier/less work. Use HTML inline in the $Text to use images stored outside Tinderbox. To use preview you will need to have exported the document once (so Tinderbox knows where to look for the image). But, if your plan is to export anywaythat’s no impediment as you’re going to export anyway.