My script has an ouchie

Sorry, I'm not sure why this forum isn't parsing bbcode. I did try to encapsulate the script in a CODE block. :(

Well, the code tags are there if and when they start to work. By the way, I've updated the script after comparing it to a few scripts in-game but it's still not working.

That reference to self.physique is a copy/paste from def _get_fit_fat(self) in sim_info.py (which is why I'm importing it).
Sorry, I whacked the import statements when I updated the post. Let me add it again. And nothing new in the lastException.txt file.

Well, my script has gotten more complicated, and I at least know it's loading thanks to all the additional output lines. Right now, it's stalling on Line 16 and I don't know why.

import services
import sims4.commands
import sims.sim_info
from server_commands.argument_helpers import OptionalTargetParam, get_optional_target, RequiredTargetParam, TunableInstanceParam, OptionalSimInfoParam
	
@sims4.commands.Command('getphysiques', command_type=sims4.commands.CommandType.Live)
def getphysiques(first_name='', last_name='', sim_a_id:OptionalTargetParam=None, _connection=None):
	output = sims4.commands.CheatOutput(_connection)
	output('Starting command')
	sim_a_id = services.sim_info_manager().get_sim_info_by_name(first_name, last_name)
	if sim_a_id is None:
		output('Sim ID not found')
		return False
	output('{} {} has sim id: {}'.format(first_name, last_name, sim_a_id.id))
	output('About to get optional target')
	sim = get_optional_target(sim_a_id, _connection)
	if sim is not None:
		output('Sim successfully targeted')
		physique = 
		if physique is None:
			output = sims4.commands.CheatOutput(_connection)
			output('Physique variable is still None')
			return False
		output('Physique variable is not None!')
		heavy = float(physique)
		lean = float(physique)
		fit = float(physique)
		bony = float(physique)
		if heavy is None and lean is None and fit is None and bony is None:
			output('BBT variables not set')
			return False
		output('At least one BBT variable set!')
		output('This Sims\' physiques are: Heavy:{} Lean:{} Fit:{} Bony:{}'.format(heavy, lean, fit, bony))
		return True
	output('Sim not targeted')
	return False

I've managed to make some progress with my script. Everything is working, but I'm getting some less than desirable results. First off here's the new script...

import services
import sims4.commands
import sims.sim_info
from server_commands.argument_helpers import OptionalTargetParam, get_optional_target, RequiredTargetParam, TunableInstanceParam, OptionalSimInfoParam
from sims.sim_info import SimInfo
	
@sims4.commands.Command('getphys', command_type=sims4.commands.CommandType.Live)
def getphysiques(first_name='', last_name='', sim_a_id:OptionalTargetParam=None, _connection=None):
	physique_range = 1000
	output = sims4.commands.CheatOutput(_connection)
	output('Starting command for {} {}'.format(first_name, last_name))
	sim_a_id = services.sim_info_manager().get_sim_info_by_name(first_name, last_name)
	if sim_a_id is None:
		output('Sim ID not found')
		return False
	#output('{} {} has sim id: {}'.format(first_name, last_name, sim_a_id.id))
	if sim_a_id is not None:
		physique = 
		if physique is None:
			output = sims4.commands.CheatOutput(_connection)
			output('Physique variable is still None')
			return False
		output('Current List: {}'.format(physique))
		heavy = float(physique)*physique_range
		lean = float(physique)*physique_range
		fit = float(physique)*physique_range
		bony = float(physique)*physique_range
		pregnant = float(physique)*physique_range
		hipswide = float(physique)*physique_range
		hipsnarrow = float(physique)*physique_range
		waistwide = float(physique)*physique_range
		waistnarrow = float(physique)*physique_range
		output('Physiques are: Heavy0: {}  Fit1: {}  Lean2: {}  Bony3: {}  Pregnant4: {}  HipsWide5: {}  HipsNarrow6: {}  WaistWide7: {}  WaistNarrow8: {}'.format(heavy, fit, lean, bony, pregnant, hipswide, hipsnarrow, waistwide, waistnarrow))
		return True
	output('Sim not targeted')
	return False
	
@sims4.commands.Command('setphys', command_type=sims4.commands.CommandType.Live)
def setphysiques(first_name='', last_name='', bbt:int=0, newval:float=0, sim_a_id:OptionalTargetParam=None, _connection=None):
	physique_range = 1000
	output = sims4.commands.CheatOutput(_connection)
	output('Starting command for {} {}'.format(first_name, last_name))
	sim_a_id = services.sim_info_manager().get_sim_info_by_name(first_name, last_name)
	if sim_a_id is None:
		output('Sim ID not found')
		return False
	#output('{} {} has sim id: {}'.format(first_name, last_name, sim_a_id.id))
	output('BBT Provided: {}  New Value Provided: {}'.format(bbt, newval))
	if sim_a_id is not None:
		physique = 
		if physique is None:
			output = sims4.commands.CheatOutput(_connection)
			output('Physique variable is still None')
			return False
		output('Current List: {}'.format(physique))
		physique = str(newval)
		output('New Physique Value: {}'.format(physique))
		physique = ','.join()
		sim_a_id.physique = physique
		output('New List: {}'.format(sim_a_id.physique))
		return True
	output('Sim not targeted')
	return False	

Now, what IS working...

It will successfully enumerate the Physique list from the referenced Sim and it will allow you to set almost all of the values.

And what's not working....

When you set any of the values they do not actually apply to the avatar. Is there another function I need to call to initiate the change to the avatar's shape?

For whatever reason the Pregnant physique appears to be read-only and will not allow you to set the value, or if it does something is change it back to zero immediately. Is there another value or script that controls the pregnant physique?

And lastly, the Hip and Waist physiques are never-ever populated, even if the figure has the hip or thigh dials moved from zero position. Are this physiques simply not used and there is yet another group of variable that hold the remaining CAS data?

I'm hoping to develop bodyshape editor mod at some point and this was the first test-case to see what is and isn't possible. Any insight into these questions would be most helpful!

Awesome! Good to know. With regards to the first four physiques would you know why it's not actually changing the body shape when these values are set? I'm assuming there must be another function I need to call in order to affect the change once the values are set and that the system isn't constantly looking at the Physique values to spot a change.

Actually, I wonder if maybe I should be sticking with the Fit and Fat attributes since they already have established functions for doing the math on how the four associated physiques should be altered. It'd be safer and may fix the not-applying issue. For instance, with my method it's possible to assign values to two opposing physiques (ie. heavy and lean) whereas sticking with Fit and Fat will avoid that issue altogether.

I had hopes of discovering how one to could adjust the attributes of all the CAS modifiers programmatically but its beginning to look like that just isn't possible outside of CAS.

You should be able to access all of the CAS modifiers via facial_attributes and genetic_data. Those are stored on SimInfo as binary strings. You'll have to deserialize them, perform any modifications, and then reserialize them before setting them.

It's because of your New Member status. They have it set up so that you need a certain post count before you can use formatting. But see here.

Your command does not reference any particular Sim. self.physique is probably throwing exceptions, which you can find in Documents\Electronic Arts\The Sims 4\lastException.txt