ServerSocketConnection: ConnectionNotFound exception - Possible causes?

Question

Hi all,
I was writing a J2ME Midlet which performs some monitoring of ports in a certain range on my device. In my program, I attempt to establish a ServerSocketConnection to ports within the range to check for ports which are currently in use.
I had used the following code fragment (similar to many examples and forum postings)
for (int i = LOWER_LIMIT; i< UPPER_LIMIT; i++) {
    try {
        ServerSocketConnection scn = (ServerSocketConnection) Connector.open("socket://:"+i);
        // Exception is thrown immediately after the previous line (has been verified)
        scn.close
    catch (ConnectionNotFoundException e) {
        // output to text box exception type and error message
    catch (IOException e) {
        if (e.getMessage.equals("ServerSocket open"))
              // write to logfile (port is in use)
}There were no issues running my midlet on emulators in WTK2.5.2, Netbeans and Eclipse. However, I have consistently encountered the ConnectionNotFoundException (with error message null) upon running the midlet on my mobile phones. This behavior has been observed on the Nokia N95 and Dopod D810. I've set the required permissions in my JAD file and have also conformed the settings to the JTWI configurations (MIDP2.0/CLDC1.0).
I'm extremely puzzled by this strange behavior. What could be a probable cause? Is there a possibility that ServerSocketConnections are barred by certain devices or manufacturers?
Thanks in advance!

Answer 1

I told you in one of your earlier threads:
"Can't call rollback when autocommit=true" is a pretty clear message. Your Connection is set up with autoCommit true, so you can't rollback.
If you don't want it to rollback at all, checkthe JSP called something like "frmNCNRaiseNCN.jsp", it calls NCNSecurity.RollBack somewhere.
Also, please try to learn how to read a stack trace.