I've tried to create a modified version of Extended Timeline in which I route trade to Nippon as an end node in addition to the European end nodes. I seem to have the routes put together properly, as the game starts up and runs fine, except that I encounter a crash every time I open up a country's missions tab. This happens regardless of country or year. Nothing else seems to cause a crash - ran one game for 20+ years and everything was fine until I clicked on the missions tab. The only file I have changed is the Trade Nodes text file.

Does anyone have any thoughts about what could be causing this issue and/or how to fix it? I appreciate any advice.