Column X in the database does contain object

[Ken Zie]

Hello Professor,
I am currently trying to make an MNL model to model asymmetry in the VOT. When i try to insert my dataframe, this happened, why does this error happen? Isn't it supposed to contain object?

Thank you so much
Best Regards
Kenzie Herianto

[Bierlaire Michel]

Biogeme works only with numerical data. 

By “object”, it means an entry that is not numeric. 

Update the column FFT_DEC_IKEA such that it contains only numerical values.

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[Ken Zie]

Thanks a lot. Sorry this is my first time using google groups and havent read the earlier questions earlier... The error is successully solved!