Having trouble with rcp.el syntax

[Jesse Marlin]

I looked in rcp.el for the syntax for opening remote files, and found:

/r@METHOD:USER@HOST:FILENAME

I am confused about the r@METHOD part.  I have tried it without it (hoping 
that the default would get used) and EFS gets used instead.  I will 
eventually want to use ssh and scp, but have been experimenting around with 
rsh, and rcp because it is setup and working correctly. 

C-x C-f /r@rsh:me@myhost:/home/me/t.txt

Wrong type argument: stringp, nil



Thanks for any help.  jlm.