I extensively use this script at the moment and I managed to either break something on roll20 or with the script. Some table names are in a state where they are "used" now but do not show up in the table list. The only solution is to use a different name. I can manually add a table with that name but from that moment on this name won't work with tableexport anymore. I made a new thread as the old one is closed (timed out)
