The get_timeseries api method in Eikon python API converts the RIC to uppercase before invoking the call. This results in invalid instrument which have lowercase letters in the RIC.
E.g. Bombardier Inc, class B shares has a RIC: BBDb.TO
This issue will be fixed in a next version (> 0.1.10).
In the meantime, there is a workaround : replace 'BBDb.TO' with ['BBDb.TO']
>>> eikon.get_timeseries(['BBDb.TO'])
