Zwift inProgressActivity.fit file

[rveachkc]

I'm trying to parse a Zwift fit file from an activity in progress, and I'm not having any luck with it. I fear Zwift isn't writing a valid file at this point, but is there something else going on?

Source File from 5 minute ride: inProgressActivity.zip

fittxt output: fittxt_out.txt

In my code, I'm opening up the file just like your example:

with fitdecode.FitReader(in_progress_file) as fit:

Error:

(venv) C:\Users\user\Documents\project\src>python project.py
DEBUG:Located in progress fit file: C:\Users\user\Documents\Zwift\Activities\inProgressActivity.fit
Traceback (most recent call last):
  File "C:\Users\user\Documents\project\venv\lib\site-packages\fitdecode\reader.py", line 645, in _read_data_message
    def_mesg = self._local_mesg_defs[record_header.local_mesg_num]
KeyError: 2

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\user\Documents\project\src\project.py", line 97, in <module>
    z.run()
  File "C:\Users\user\Documents\project\src\project.py", line 85, in run
    for record in records:
  File "C:\Users\user\Documents\project\venv\lib\site-packages\fitdecode\reader.py", line 232, in __iter__
    yield from self._read_next()
  File "C:\Users\user\Documents\project\venv\lib\site-packages\fitdecode\reader.py", line 363, in _read_next
    record = self._read_record()
  File "C:\Users\user\Documents\project\venv\lib\site-packages\fitdecode\reader.py", line 530, in _read_record
    message = self._read_data_message(chunk, record_header)
  File "C:\Users\user\Documents\project\venv\lib\site-packages\fitdecode\reader.py", line 647, in _read_data_message
    raise FitParseError(
fitdecode.exceptions.FitParseError: FIT parsing error @ 167: local message 2 not defined