The plugin still fails. Same message.
My OSC DB originally was upgraded from OSC v.2 to 2.3.3.4 and has run just fine. Just to see if there is a structural problem I created a clean install of OSC 2.3.3.4, then imported my products into it. It imported fine but even when I point the plug in to the new unmodified DB in the clean install it fails.
Your last post suggests that the problem lies in the category tables, FYI all the categories have imported just fine, they are all present in WooCommerce, but no products are there.
Any other suggestions?