KeyError: 'model' when processing data load in Data Formulator"

[ttnghia962]

When I try to load data into Data Formulator, the server returns a 500 error with stack trace showing KeyError: 'model'. It seems that the API call to /api/agent/process-data-on-load misses the 'model' key in the payload.

Environment:

• Python version: 3.11
• OS: Windows 11
• Installed via pip

Steps to reproduce:

1. Run command data_formulator
2. Load a CSV or Excel file
3. Perform data processing triggering API call /api/agent/process-data-on-load
4. Observe the error in server logs

Log excerpt:
Traceback (most recent call last):
File ".../agent_routes.py", line 181, in process_data_on_load_request
client = get_client(content['model'])
KeyError: 'model'

Please advise on how to fix or if this is a bug.

[ttnghia962]

[Chenglong-MS]

This could be a bug, what did you provide in model config in the tool?

[ttnghia962]

This could be a bug, what did you provide in model config in the tool?

I followed those steps.

[Chenglong-MS]

it seems you are using an earlier version of data formulator --- I guess you are using it from codespace (sorry we haven't update that, will fix soon)

but even in codespace, you can do pip install --upgrade data_formulator to get the newest version, and issues should be resolved!

[ttnghia962]

it seems you are using an earlier version of data formulator --- I guess you are using it from codespace (sorry we haven't update that, will fix soon)

but even in codespace, you can do pip install --upgrade data_formulator to get the newest version, and issues should be resolved!

Hi, I used it on VSC

[Chenglong-MS]

can you check with pip show data_formulator?

Name: data_formulator
Version: 0.5

if this is not 0.5, you can upgrade it with pip install --upgrade data_formulator, thanks!

[ttnghia962]

can you check with pip show data_formulator?

Name: data_formulator Version: 0.5

if this is not 0.5, you can upgrade it with pip install --upgrade data_formulator, thanks!

I tried pip install --upgrade data_formulator but version is always "Version: 0.2.2"

[ttnghia962]

Hi, problem solved. Update python>3.12

[Chenglong-MS]

Thanks for the insight! The new version 5.0.2 is fixed with python version issue, it now also support python 3.9.

(also fixed a little issue with gpt-5.1, so it could be nice to update)