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Using Python 3.6. I have a simple dataframe: DateTimeIndex, 104 rows, about 30 columns of Floats. Total size 30kb according to df.info(). So nothing special.

But if I try to view the dataframe or do anything with it, for example, copy it, new_df = problem_df.copy() I immediately get "Kernel has died; restarting". There are no further error messages or any other clues what is happening.

I've restarted the kernel again, but that fixes nothing.

Are there any logfiles or other ways to figure out exactly what is causing the kernel crash? It seems to be exlusively related to this problem_df

Odd. I can't find anything in the logs that says why it might be crashing -- it's not because it's using up too much memory, at least. What happens if you try to run the same code in a console?

I ended up killing all my ipython processes and reloading the notebook -- everything then worked.

How odd! Were there a lot of IPython processes -- that is, over a hundred?