timeBasedSeq fails when the BY argument is M, S, or H and the start and end do not include the time

[marascio]

timeBasedSeq('20141201/20141231/M') should return a series of 1 minute spaced observations for each date in the specified range. Instead it returns a series of dates without the time component.

If instead you specify timeBasedSeq('20141201 0000/20141231 2359') you get the expected result because the time resolution is inferred from the time component of the range.