anchor.diff:    grep "404 Not Found" /tmp/stderr 2>&1 >/dev/null
     if test $? -eq 0; then
       echo "ERROR 404"
  -    unable_to_retrieve_package
  +    http_404_error
     fi
   
     # check for bad return status or empty output
  
positive.code:   grep "404 Not Found" /tmp/stderr 2>&1 >/dev/null
    if test $? -eq 0; then
      echo "ERROR 404"
      unable_to_retrieve_package
    fi
  
    # check for bad return status or empty output
  
negative.code:   grep "HTTP Error 404" /tmp/stderr 2>&1 >/dev/null
    if test $? -eq 0; then
      echo "ERROR 404"
      http_404_error
    fi
  
    # check for bad return status or empty output
  