[LAU] jack_disconnect on ports with spaces

Hi list, I have a script that needs to disconnect various jack connections. Works fine with client/port names without spaces, like this: jack_disconnect pure_data_0:output0 system:playback_1 Other port names (specifically, ALSA MIDI port names) however have spaces in them and don't seem to work with jack_disconnect. Have tried putting quotes around the names, eg. jack_disconnect 'Pure Data:PureData Midi-Out 1' 'Hammerfall DSP:HDSP MIDI 1' and jack_disconnect 'Pure Data':'PureData Midi-Out 1' 'Hammerfall DSP':'HDSP MIDI 1' Tried double-quotes too as well as underscore characters between the words but none of these techniques work unfortunately. They result in error messages like this: ERROR Hammerfall DSP:HDSP MIDI 1 not a valid port Nor have i found a way to rename the ports. Some more detail: In qjackctl, these ALSA client and port names include numbers. eg. 129:Pure Data and the port: 1:Pure Data Midi-Out The HDSP has this too: 20:Hammerfall DSP and 0:HDSP MIDI 1 I've tried I think all the permutations of names with numbers, numbers without names and names and numbers together but I can get none to work; Any suggestions? Cheers, Iain