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OpenOCD: "Error: open failed" in procedure "transport"

Question asked by carroll.steve on Mar 6, 2015
I'm trying to use openocd with both a stm32f411 and a stm32l053 board.   I've tried it on both Linux and Windows 8.1 and in both cases I am seeing the following:

steve@scarroll-mint ~ $ openocd -f board/stm32ldiscovery.cfg
Open On-Chip Debugger 0.7.0 (2013-10-22-08:31)
Licensed under GNU GPL v2
For bug reports, read
srst_only separate srst_nogate srst_open_drain connect_deassert_srst
Info : This adapter doesn't support configurable speed
Error: open failed
in procedure 'transport'
in procedure 'init'

any ideas?