[SKiDL BUG] generate_svg() consistently raises UnboundLocalError

[mawildoer]

Describe the bug
I've run generate_svg() on a couple of scripts now that successfully generate_netlists, but it consistently raises an exception UnboundLocalError: local variable 'num_units' referenced before assignment (with a traceback)

To Reproduce
Steps to reproduce the behavior:

1. Install skidl 1.1.0 (latest as of writing, but the exception occurs in 1.0.0 too)
2. Add generate_svg() to the bottom of a seemingly otherwise functional script (see snippet below)
3. Execute script

Snippet:

from skidl import *

# Create input & output voltages and ground reference.
vin, vout, gnd = Net('VI'), Net('VO'), Net('GND')

# Create two resistors.
r1, r2 = 2 * Part("Device.kicad_sym", 'R', TEMPLATE, footprint='Resistor_SMD.pretty:R_0805_2012Metric')
r1.value = '1K'   # Set upper resistor value.
r2.value = '500'  # Set lower resistor value.

# Connect the nets and resistors.
vin += r1[1]      # Connect the input to the upper resistor.
gnd += r2[2]      # Connect the lower resistor to ground.
vout += r1[2], r2[1] # Output comes from the connection of the two resistors.

generate_svg()

Expected behavior
An SVG to be generated, per docs here: https://devbisme.github.io/skidl/#svg-schematics

Screenshots

Desktop (please complete the following information):

• OS: Mac OSx 12
• Python version: Python 3.10.6
• SKiDL version 1.1.0

Additional context
As I mentioned at the top, I've attempted this on a few other designs, but it's consistently arising. I feel like this is something likely to have been raised before me though, so not sure what's up. Thank you for your assistance. It's greatly appreciated!

[devbisme]

Thanks for the clear error report! I've replicated the error. I'll try to push a correction to the development branch today.

[devbisme]

Well, I found the reason for this error: the drawing commands for KiCad V6 symbols are not processed so there's nothing for the SVG generator to work on. This is a larger fix than I can do right now, so your only immediate fix is to drop back and use KiCad V5 libraries. Sorry!

[devbisme]

I've opened an enhancement issue and closed this one.

[mimidbe]

Good morning,
the problem still persists!
I installed skidl version 1.1.0 , and use it under jupyter.
and I get the following error:

for the same previous file!

Thank you for your assistance.