java.io.IOException SymbianOS error = -11

[israel.martinez]

Hi All,

I’m working on an application that works as follows:
From a Nokia 6670 I connect using bluetooth to a GPS Receiver, I get the data and then I send it across the Internet to a server.

The problem I’m having is that the phone connects once to the GPS Receiver, and the second time it throws an exception like:

Exception: java.io.IOException
SymbianOS error = -11:
General: System Error

My Connection funciton looks like this:

public void myFunct()
    {
        StreamConnection conn = null;
        InputStream is = null;
        
        try{
            conn = (StreamConnection)Connector.open(url);
            is = conn.openInputStream();

            int i = 0;
            char c;
            String s = "";
            

            // Start reading the data from the GPS
            
            do{
                i = is.read(); // read one byte at the time.
                c = (char)i;
                s += c;

            }while(i != -1);         

            this.GPS.append(s, null);
            
            //  closing the connection
            conn.close();
            
        }catch(Exception e)
        {
            Alert alert = new Alert("Error");
            alert.setType(AlertType.ERROR);
            //soundAlert.setTimeout(20);
            alert.setString(e.toString());
            display.setCurrent(alert);
        }
    }

Does anybody know how to solve this problem?

[majidasgari]

as you can see in here, -11 means "An object already exists. An object of some name/type is to be created, but an object of that name/type already exists." Haven't you create the same stream multiple time?
I'm thinking This error is exists just in Symbian phones. I guess you can run this app on some other phones like SE-W810

[majidasgari]

The reason is this line:
conn = (StreamConnection)Connector.open(url);
don't open the same url twice. and also don't close conn. just close the stream. use the same conn for another stream. You can use a boolean value to open connector just one time

[raj_J2ME]

Hello,
As you are aware that the above error code stand for this,

An object already exists.
An object of some name/type is to be created, but an object of that name/type already exists.

That means your previously opened connection is still open and you are again trying to open the same connection.
Better you make a method which disconnect the connection and make a call to this method just before you gonna create/open the new connection. Kindly try to implement this and have a look over if the underlined issues get resolved.

[jitu_goldie]

Always close the streams first before closing the connection.. Just check out and revert