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  1. #1
    Registered User
    Join Date
    Apr 2012
    Posts
    17

    Exclamation Could not open serial device: The port COM4 could not be opened: Port in use

    Hello,
    I'm working with Qt SDK that suddenly started to have a big problem: whenever I try to deploy and run my application on a Symbian device (Nokia C7 Belle with usb connection) it shows this error: Could not open serial device: The port COM4 could not be opened: Port in use .
    I tried a different solutions to resolve: changed usb port, restarted my device, uninstalled Qt Creator removing old settings. I also notices that this problem happens with all applications (i tried to make a new app without any code change and run it.)
    If I run the application on the simulator everything works fine.
    Can someone help to resolve this problem?
    Last edited by daljit97; 2013-09-01 at 11:44.

  2. #2
    Regular Contributor
    Join Date
    Apr 2012
    Location
    malaysia
    Posts
    262

    Re: Could not open serial device: The port COM4 could not be opened: Port in use

    Which device display this error?.Is it the CODA in your phone or the qt creator error during compiling and deploying your apps.

  3. #3
    Registered User
    Join Date
    Apr 2012
    Posts
    17

    Re: Could not open serial device: The port COM4 could not be opened: Port in use

    It's Qt Creator, by the way I found the solution: the problem is that I installed Epoc Cam software to use my phone as a webcam. I removed it and everything is working fine now.

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