I tested your code, it dosent work as it should, this one:
Code:
alias test {
  set -l %xx $lines($+(",$mircdir,aj\,%tnwork,.txt,"))
  set -l %chan $read($+(",$mircdir,aj\,%tnwork,.txt,"),nt,%xx)
  while (%xx) {
    dec %xx
    set %chan $read($+(",$mircdir,aj\,%tnwork,.txt,"),nt,%xx)
    join %chan
  }
}

it only join the last channel in the *.txt file, not the others added in it..

if ($me != tired) { return } | else { echo -a Get a pot of coffee now $+($me,.) }