I've had a small issue with smslib really tying me down. I am experimenting with the sms lib. The code works as expected in netbeans. sending and receiving sms's when i run the same .jar in the command prompt it fails with a noportfound exception. ive tried going thru stakeoverflow and googled to no avail. added all possible paths to the classpah. still no luck tried running the same from the cmd with no luck. my classpath is as below C:\Program Files\Java\jdk1.7.0_11;C:\Program Files\Java\jdk1.7.0_11\lib\;C:\Prog ram Files\Java\jdk1.7.0_11\jre\lib\ext;c:\windows\system32;C:\Program Files\Java \jdk1.7.0_11\jre\bin;C:\Program Files\Java\jdk1.7.0_11\jre\lib; D:\dev_java\sms\ smsquery\dist\lib; D:\dev_java\sms\smsquery\dist Specifying the classpath from the cmd as below java -classpath D:\dev_java\sms\smsquery\dist\lib -jar smsquery.jar org.smslib.GatewayException: Comm library exception: java.lang.RuntimeException: javax.comm.NoSuchPortException at org.smslib.modem.SerialModemDriver.connectPort(SerialModemDriver.java :102) at org.smslib.modem.AModemDriver.connect(AModemDriver.java:114) at org.smslib.modem.ModemGateway.startGateway(ModemGateway.java:189) at org.smslib.Service$1Starter.run(Service.java:277) any ideas? -- Peter Muchemi