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Last modified: 26 October 2020

URL: https://cxc.cfa.harvard.edu/sherpa/bugs/get_draws.html

Bugs: get_draws


Bugs

ValueError: sigma is not positive definite

The get_draws command may return with the error message

ValueError: sigma is not positive definite

There is a bug in the code that is performing an extra check on the data that may cause this exception to be thrown for certain datasets.

There is no simple work around.