Calculate LCA causes ValueError: Length mismatch

[nheeren]

Just tried to do an LCA for 14 products and 11 impact categories and got the following error. Not sure what caused it. Will explore further and update.

Traceback (most recent call last):
  File "/Users/n/code/_env/miniconda3/envs/ab/lib/python3.7/site-packages/activity_browser/app/ui/tabs/LCA_results_tab.py", line 41, in generate_setup
    new_tab = LCAResultsSubTab(self, name)
  File "/Users/n/code/_env/miniconda3/envs/ab/lib/python3.7/site-packages/activity_browser/app/ui/tabs/LCA_results_tabs.py", line 90, in __init__
    self.setup_tabs()
  File "/Users/n/code/_env/miniconda3/envs/ab/lib/python3.7/site-packages/activity_browser/app/ui/tabs/LCA_results_tabs.py", line 119, in setup_tabs
    self.inventory_tab.update_table()
  File "/Users/n/code/_env/miniconda3/envs/ab/lib/python3.7/site-packages/activity_browser/app/ui/tabs/LCA_results_tabs.py", line 576, in update_table
    self.df_biosphere = self.parent.contributions.inventory_df(inventory_type='biosphere')
  File "/Users/n/code/_env/miniconda3/envs/ab/lib/python3.7/site-packages/activity_browser/app/bwutils/multilca.py", line 463, in inventory_df
    df.columns = self.get_labels(self.mlca.fu_activity_keys, max_length=30)
  File "/Users/n/code/_env/miniconda3/envs/ab/lib/python3.7/site-packages/pandas/core/generic.py", line 5192, in __setattr__
    return object.__setattr__(self, name, value)
  File "pandas/_libs/properties.pyx", line 67, in pandas._libs.properties.AxisProperty.__set__
  File "/Users/n/code/_env/miniconda3/envs/ab/lib/python3.7/site-packages/pandas/core/generic.py", line 690, in _set_axis
    self._data.set_axis(axis, labels)
  File "/Users/n/code/_env/miniconda3/envs/ab/lib/python3.7/site-packages/pandas/core/internals/managers.py", line 183, in set_axis
    "values have {new} elements".format(old=old_len, new=new_len)
ValueError: Length mismatch: Expected axis has 13 elements, new values have 14 elements

[nheeren]

Just re-did the calculation setup and it works there. Possibly the calculation setup somehow got dorked...

[nheeren]

Went back to the old calculation setup, deleted a few processes and now it works. Sorry, not sure how to debug further. Feel free to close.

[dgdekoning]

Interesting, I'll make a note of this, seems like an annoyance to have happen.
Did you edit the processes in the setup after creating the calculation setup (add/remove exchanges, change names, locations, units)?

[nheeren]

Did you edit the processes in the setup after creating the calculation setup (add/remove exchanges, change names, locations, units)?

No. I didn't do anything fancy really...

[dgdekoning]

I'll check up and down the error message tomorrow and see if there is something that could cause this, might find some things to improve.

[dgdekoning]

Closing until further notice, feel free to (re)open if it happens again!

[dgdekoning]

A possible fix for this issue is included in this pull request. It turns out that the rows in the table were being counted before the underlying models had been updated, which meant that the problem could mysteriously fix itself (e.g. The app was closed/opened or by moving between projects).