# ArgumentError for prodigy train on v1.11.0a6

**URL:** <https://support.prodi.gy/t/argumenterror-for-prodigy-train-on-v1-11-0a6/4132>\
**Category:** Uncategorized\
**Tags:** done, nightly\
**Created:** [April 13, 2021, 6:43pm UTC](https://support.prodi.gy/t/argumenterror-for-prodigy-train-on-v1-11-0a6/4132 "2021-04-13T18:43:25Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![jamiehannaford](https://sea2.discourse-cdn.com/flex020/user_avatar/support.prodi.gy/jamiehannaford/32/2093_2.png) [@jamiehannaford](https://support.prodi.gy/u/jamiehannaford)\
**Post date:** [April 13, 2021, 6:43pm UTC](https://support.prodi.gy/t/argumenterror-for-prodigy-train-on-v1-11-0a6/4132/1 "2021-04-13T18:43:25Z")

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👋 When using `prodigy train` (and a few other commands), I receive this error on `v1.11.0a6`:

> Traceback (most recent call last):  
> File "/Users/jamie/.pyenv/versions/3.8.7/lib/python3.8/runpy.py", line 194, in \_run\_module\_as\_main  
> return \_run\_code(code, main\_globals, None,  
> File "/Users/jamie/.pyenv/versions/3.8.7/lib/python3.8/runpy.py", line 87, in \_run\_code  
> exec(code, run\_globals)  
> File "/Users/jamie/.pyenv/versions/3.8.7/lib/python3.8/site-packages/prodigy/ **main**.py", line 54, in   
> controller = recipe(\*args, use\_plac=True)  
> File "cython\_src/prodigy/core.pyx", line 329, in prodigy.core.recipe.recipe\_decorator.recipe\_proxy  
> File "/Users/jamie/.pyenv/versions/3.8.7/lib/python3.8/site-packages/plac\_core.py", line 363, in call  
> parser = parser\_from(obj)  
> File "/Users/jamie/.pyenv/versions/3.8.7/lib/python3.8/site-packages/plac\_core.py", line 147, in parser\_from  
> parser.populate\_from(obj)  
> File "/Users/jamie/.pyenv/versions/3.8.7/lib/python3.8/site-packages/plac\_core.py", line 318, in populate\_from  
> self.add\_argument(  
> File "/Users/jamie/.pyenv/versions/3.8.7/lib/python3.8/argparse.py", line 1386, in add\_argument  
> return self.\_add\_action(action)  
> File "/Users/jamie/.pyenv/versions/3.8.7/lib/python3.8/argparse.py", line 1749, in \_add\_action  
> self.\_optionals.\_add\_action(action)  
> File "/Users/jamie/.pyenv/versions/3.8.7/lib/python3.8/argparse.py", line 1590, in \_add\_action  
> action = super(\_ArgumentGroup, self).\_add\_action(action)  
> File "/Users/jamie/.pyenv/versions/3.8.7/lib/python3.8/argparse.py", line 1400, in \_add\_action  
> self.\_check\_conflict(action)  
> File "/Users/jamie/.pyenv/versions/3.8.7/lib/python3.8/argparse.py", line 1539, in \_check\_conflict  
> conflict\_handler(action, confl\_optionals)  
> File "/Users/jamie/.pyenv/versions/3.8.7/lib/python3.8/argparse.py", line 1548, in \_handle\_conflict\_error  
> raise ArgumentError(action, message % conflict\_string)  
> argparse.ArgumentError: argument -t/--senter: conflicting option string: -t

---

<div class="post-metadata">

**Author:** ![jamiehannaford](https://sea2.discourse-cdn.com/flex020/user_avatar/support.prodi.gy/jamiehannaford/32/2093_2.png) [@jamiehannaford](https://support.prodi.gy/u/jamiehannaford)\
**Post date:** [April 13, 2021, 6:55pm UTC](https://support.prodi.gy/t/argumenterror-for-prodigy-train-on-v1-11-0a6/4132/2 "2021-04-13T18:55:48Z")

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I managed to fix the above error by setting `use_plac=False` on L54 in `prodigy/ __main__.py` 🙇‍♂️

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<div class="post-metadata">

**Author:** ![ines](https://sea2.discourse-cdn.com/flex020/user_avatar/support.prodi.gy/ines/32/3_2.png) [@ines](https://support.prodi.gy/u/ines)\
**Post date:** [April 14, 2021, 1:21am UTC](https://support.prodi.gy/t/argumenterror-for-prodigy-train-on-v1-11-0a6/4132/3 "2021-04-14T01:21:44Z")

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Ah, sorry about that, this was a bug in the recent nightly release! I'm just building a new version.

In the meantime, the actual fix needed is to find the following line in `recipes/train.py` and change the `"t"` to `"s"` (the shortcut used for this particular argument, a copy-paste mistake caused a conflict here):

```python
"senter": ("Comma-separated sentence datasets", "option", "s", split_string),

```

**Edit:** Fixed in v1.11.0a7!