Hi @<1523701504827985920:profile|SubstantialElk6> !
Regarding 1: pth files get pickled.
The flow is like this:

• The step is created by the controller by writing some code to a file and running that file in python
• The following line is ran in the step when returning values: None
• This is eventually ran: None
• The file will get pickled here: NoneNote that we have a this argument: None . So if your files can’t be pickled, you can serialize them some other way (maybe use dill None )