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I keep getting an error in my Python caller transformer trying to convert dates in the format '%Y%m%d' to Python 'datetime.datetime' format. The transformer works for the first 236 features and generates the following error:

Python Exception <TypeError>: strptime() argument 1 must be str, not None

Traceback (most recent call last):

File "<string>", line 38, in input

TypeError: strptime() argument 1 must be str, not None

Error encountered while calling method `input'

I have examined the input data and nothing seems out of place or wrong with the data. I am not sure what's causing this.

Hi @benadei​,

It looks like the attribute you are trying to convert is empty or missing on feature 237. In this case, the getAttribute() method will return None. Perhaps add an if before the conversion to test that value != None.

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