Honeybee run daylight simulation error

hi, everyone ,i’m running a honeybee daylight simulation, but there is an error, i can’t read the annual result, and it says “1. Solution exception:‘NoneType’ object has no attribute ‘lower’”, if somebody can tell me what’s the meaning of it? Many thanks.


My guess is you have some components that are copied from other files that have different version than the rest components. Double check the version of each component, and make sure they are the same.

If this is not the case, please attach a screenshot to show the problem.

Thanks! your guess is absolutely right! I just rebuild all the model and the problem is solved. I am so excited now since i have been puzzled by the problem for a week! thanks very much.