I have a small program (see below) that connects to a network power switch and turns power on and off (NetSwitchOn();). If another connection is made prior to yours the unit will reject the connection. I have added an error handler (Errmode => sub {&errorHandler()},) but the problem is that if the second sub call trys to turn on the power and if there is an error I only get one loop and then the progress bar, not retrying the telnet connection. The first call will retry until the connection is made. 
--------------------code below ---------------------------

# Power switch on sub
# This will connect to a network power switch and apply power to the u
+ut
# Author:
# Date: 6/2/04
# Rev: 01
sub NetSwitchOn {
print <<EOB;
Turning on the UUT....  ;-)
EOB
$telnet = Net::Telnet->new(           Host     => $PS2,
                      Port     => 23,
                      Prompt => '/[$%#>] $/',
                      Errmode   => sub {&errorHandler()}, 
                      Input_log  => $pwr_log,
                      Dump_log   => $dumpPW_log,
                      ) or "return"; 

print "Connected to Power Switch: ", $PS2,  "\n";
print "-" x 40, "\n";
$telnet->print ('/on 1'); 
ok ($telnet->waitfor('/Processing - please wait/'),     "Turning on th
+e power switch");
ok ($telnet->waitfor('/Complete/'),                "Unit is on");
$telnet->print ('/x');
$telnet->close;
print "Connection closed:   ;-( \n ";
print "-" x 40, "\n";
}

#---------------------------------------------------------------------
+--------#
# This routine will handle the telnet object errors.
#---------------------------------------------------------------------
+--------#
sub errorHandler {
    print "Another system must be connected..\n";
    print "Will retry in 5 seconds..\n";
    sleep 5;
    redo; 
}

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In reply to net::telnet errmode issue by smurray

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