hi there i need use a funcation that send command to COM1, and my RS232 device will repond some data back, i just wrote a simple script on redhat8.0 like this: 
use Device::SerialPort;
$port = new Device::SerialPort ( "/dev/ttyS0");
$port->baudrate(9600);
$port->databits(7);
$port->stopbits(1);
$port->parity("odd");

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then i just run: 
[root@linux5 root]# perl -c tt.pl
tt.pl syntax OK

[root@linux5 root]# perl -W tt.pl
        (in cleanup) Can't call method "setcflag" on an undefined valu
+e at /usr/lib/perl5/site_perl/5.8.0/Device/SerialPort.pm line 541 dur
+ing global destruction.

[download]
can anyone tell me what is wrong??

update (broquaint): added <code> tags

In reply to send command to RS232, then get data from RS232 by wee_chang2002

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