RuntimeError While Using 'trimatic.convert_ssm_instance_to_part'

I’m attempting to create a new part from the average instance of an ssm and assign it to the variable “average_part”, but I run into the RuntimeError in the bottom picture below. The code I used is in the top image below. Why does this error occur, and how can I prevent it from happening?



Thank you in advance for your assistance.



The “coefficients” input to the “trimatic.convert_instance_to_part” must be a tuple, not a list.
The running code is pictured below.