issues with pyigm_fitlls

Tried to use pyigm_fitlls to fit a LLS. Can load OK the spectrum, but then had several errors (note that pyigm_fitdla seems to work fine, see below).

First it could not find pyigm/data/fN/EW_SPLINE_b24.yml so did create that file copying from pyigm/data/fN/EW_SPLINE_b24_2022.yml.

Following the steps here: https://pyigm.readthedocs.io/en/latest/fitlls.html, did click with mouse and then type "#", and then I get a spinning wheel, no continuum model and large amount of text (which I am happy to share everything if you feel it is needed).

Bad key mathtext.fallback_to_cm in file /Users/nl/.matplotlib/matplotlibrc, line 285 ('mathtext.fallback_to_cm : True  # When True, use symbols from the Computer Modern')
You probably need to get an updated matplotlibrc file from
https://github.com/matplotlib/matplotlib/blob/v3.5.2/matplotlibrc.template
or from the matplotlib source distribution
read_sets: Using set file -- 
  /Users/nl/python/linetools/linetools/lists/sets/llist_v1.3.ascii
Loading abundances from Asplund2009
Abundances are relative by number on a logarithmic scale with H=12
read_sets: Using set file -- 
  /Users/nl/python/linetools/linetools/lists/sets/llist_v1.3.ascii
Loading abundances from Asplund2009
Abundances are relative by number on a logarithmic scale with H=12
NOTE: You must specify the spectrum for fitting the LLS with # before modeling will begin
button=1, x=370.000000, y=203.000000, xdata=1224.830033, ydata=1.01398e-15
Initializing the continuum
/Users/nl/python/linetools/linetools/spectra/xspectrum1d.py:107: UserWarning: Assuming wavelength unit is Angstroms
  warnings.warn("Assuming wavelength unit is Angstroms")
Using P14 spline values to generate a default model
Loading: /Users/nl/opt/anaconda3/lib/python3.9/site-packages/pyigm/data/fN/fN_spline_z24.fits.gz
read_sets: Using set file -- 
  /Users/nl/python/linetools/linetools/lists/sets/llist_v1.3.ascii
Loading abundances from Asplund2009
Abundances are relative by number on a logarithmic scale with H=12

Bad key mathtext.fallback_to_cm in file /Users/nl/.matplotlib/matplotlibrc, line 285 ('mathtext.fallback_to_cm : True  # When True, use symbols from the Computer Modern')
You probably need to get an updated matplotlibrc file from
https://github.com/matplotlib/matplotlib/blob/v3.5.2/matplotlibrc.template
or from the matplotlib source distribution

.....

Traceback (most recent call last):
....
    if self.quitting: raise BdbQuit
bdb.BdbQuit

If instead I use pyigm_fitdla, that seems to work (can add continue, fit a DLA, etc...): pyigm_fitdla J1120+1104_out.fits 0.495195

Bad key mathtext.fallback_to_cm in file /Users/nl/.matplotlib/matplotlibrc, line 285 ('mathtext.fallback_to_cm : True  # When True, use symbols from the Computer Modern')
You probably need to get an updated matplotlibrc file from
https://github.com/matplotlib/matplotlib/blob/v3.5.2/matplotlibrc.template
or from the matplotlib source distribution
read_sets: Using set file -- 
  /Users/nl/python/linetools/linetools/lists/sets/llist_v1.3.ascii
Loading abundances from Asplund2009
Abundances are relative by number on a logarithmic scale with H=12
/Users/nl/python/linetools/linetools/analysis/continuum.py:249: RuntimeWarning: divide by zero encountered in true_divide
  resid = (model - s.fl) / s.er

Begin by left-clicking in the plot window!

Then any of the following keystroke commands will work:

i,o       : zoom in/out x limits
I,O       : zoom in/out x limits (larger re-scale)
Y         : zoom out y limits
y         : guess y limits
W         : Show original zooom
t,b       : set y top/bottom limit
l,r       : set left/right x limit
a,m,d     : Add/modify/delete continuum knot
A         : Add a new DLA
g         : Move nearest Lyman line to cursor and reset z
N/n       : Increase/decrease NHI
V/v       : Increase/decrease bvalue
Z/z       : Increase/decrease zabs
U/u       : Increase/decrease sig_NHI  [Default is 0.1 dex]
D         : Delete DLA
$         : Toggle displaying metal lines
6,7,8,9   : Add forest lines
?         : Print these help notes
P         : Save current screen in dla_plot.pdf
Q         : Quit the GUI

button=1, x=1054.000000, y=475.000000, xdata=1717.590575, ydata=4.68773e-15

pyigm / pyigm

issues with pyigm_fitlls #232