Haven't yet had time to update to 1.1.1.38

When adding a new sublayer this error happened;

Error while running event factoryplanner::on_gui_click (ID 1)
factoryplanner/ui/elements/production_handler.lua:69: attempt to index local 'line' (a nil value)
stack traceback:
factoryplanner/ui/elements/production_handler.lua:69: in function 'handler'
factoryplanner/ui/event_handler.lua:176: in function <factoryplanner/ui/event_handler.lua:146>

Also received this error when retying to click on a byproduct to add something to consume it:

Error while running event factoryplanner::on_gui_click (ID 1)
factoryplanner/data/classes/Line.lua:51: attempt to index local 'self' (a nil value)
stack traceback:
factoryplanner/data/classes/Line.lua:51: in function 'get'
factoryplanner/ui/elements/production_handler.lua:388: in function 'handler'
factoryplanner/ui/event_handler.lua:176: in function <factoryplanner/ui/event_handler.lua:146>

I have saves for both

Hello, thanks for the report. I'd appreciate a save to reproduce this, since this kind of issue is hard to reproduce otherwise unfortunately.

2nd error:
https://forums.sufficientvelocity.com/data/1.1-pyaddons.zip
1st error:
https://forums.sufficientvelocity.com/data/1.1-pyaddons-2.zip

Repeatedly happens if you load as 'Xon1' and click around the newest factory planner build plans.

Thanks a lot for the saves, I'll have a look.

Another error, clicking on 'tin-chromeium alloy' on the last factory planner for the Xon1 user:
factoryplanner/ui/elements/item_boxes.lua:168: attempt to index local 'item' (a nil value)
stack traceback:
factoryplanner/ui/elements/item_boxes.lua:168: in function 'handler'
factoryplanner/ui/event_handler.lua:176: in function <factoryplanner/ui/event_handler.lua:146>

https://forums.sufficientvelocity.com/data/1.1-pyaddons-3.zip

Thanks. FYI, I am not able to have a look at this until a week from now unfortunately, sorry about that.