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  1. #1
    Registered User
    Join Date
    Mar 2009

    Question [moved] Nokia E52: problems with the port USB1

    Hello to all,

    I’m developing an application on Java ME for Nokia E52, platform S60. I have a problem when I try to open a connection by the next way:

    import javax.microedition.io.Connector;
    comm = (StreamConnection)Connector.open(“comm:USB1;baudrate=115200");

    It causes the next error:

    Symbian OS error: -21

    But when I invoke the method as follow (port USB2):

    comm = (StreamConnection)Connector.open(“comm:USB2;baudrate=115200");

    It works perfectly.

    It is possible that the USB1 port is occupied by another application?


  2. #2
    Nokia Developer Moderator
    Join Date
    Mar 2003

    Re: Nokia E52: problems with the port USB1

    if you check the error description for -21: http://wiki.forum.nokia.com/index.php/Error_codes

    you could maybe conclude that the port is in use and thus you can not use it.

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