[asterisk-users] Request hangup on local channel

[Jerry Geis]

  show channels is giving me a line like:
Local/call_out at playfile-981a,2!local-playfile!call_out!4!Up!MeetMe!PA0008|1qt!3175661010!!3!2!(None)

I extract from that the following ID:
Local/call_out at smvoice-local-public-address-playfile-981a

I am trying to do the AMI "Action: Hangup" command (which I have used 
before).

and I am getting:
Response: Error\r\nMessage: No such channel\r\n\r\n

Using that same function I made for just passing to it the ID of the 
channel, I can successfully hangup SIP channels.

Can I not "hangup" a local channel?

Jerry