Currently I need heavy oil barrel.
I do have researched fluid handling, but I don't have researched advanced oil processing yet.

I tried a workaround to be able to continue playing by disabling the mod, saving the game, enabling the mod, load the game.
The first thing to research now is of course advanced oil processing, but I'm at 3% and I need a light oil barrel.

Ah this is an edge case that probably got introduced in the last version. I'll release a fix today.

Thanks

I made a workaround for now by modifying the control.lua and adding a command.
if command.parameter == "generate" then
newOrders(game.get_player(command.player_index).force_index)
UpdateOrdersGUI()
end

Not sure if my generate command breaks something, but now I get the following error.

The mod Market Science (0.1.2) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event marketscience::on_nth_tick(60)
Unknown item name: sulfuric-acid
stack traceback:
[C]: in function 'set_signal'
marketscience/control.lua:86: in function 'UpdateSignals'
marketscience/control.lua:230: in function <marketscience/control.lua:198>

So I guess I can better wait for your fix :-)

I pushed a fix that should resolve both these issues automatically. If anything is still broken do let me know!

Thanks, looks like it works correct again.