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Thread: installed teensy, arduino IDE now gets java errors

  1. #1
    Junior Member
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    installed teensy, arduino IDE now gets java errors

    Windows 10
    Updated Java
    installed arduino, open, all is well
    installed teensyuino
    Open, get long list of java errors
    tried two different computers
    Tried various reboot sequences
    Removed and re-installed
    Tried full and minimum libraries

  2. #2
    Senior Member+ Theremingenieur's Avatar
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    1.) Arduino comes with its own bundled Java runtime. There is no need for an extra Java installation.

    2.) There is a known incompatibility between Teensyduino and the Arduino releases which can be installed through the Windows Marketplace (as documented on the Teensyduino download page). Pick the classic Arduino 1.8.7 or 1.8.8 Windows installer release from the Arduino website after having uninstalled all previous stuff, let it run and then install the most recent Teensyduino over it.

    3.) Sometimes, some antivirus programs might prevent Teensyduino from patching the Arduino files which might the lead to conflicts. Make sure you disable the antivirus during the Teensyduino installation.

  3. #3
    Senior Member PaulStoffregen's Avatar
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    Maybe you're seeing this problem? (just a guess, without knowing the actual errors or seeing your screen)

    https://forum.pjrc.com/threads/54608...allation-issue

    If that's what's happening, the solution is simple: just select anything in the Tools > Ports menu. Doesn't matter what you select, even something that's not a board at all (eg, if your computer has bluetooth, it might appear in that menu). Then restart Arduino. This bug is triggered only when nothing has ever been selected. (prior versions of Arduino always had a default - recently it changed)

    Or you could install this beta which has the bug fixed. But if you can select something in the Ports menu, you're probably better off using the stable 1.45 rather than the 1.46 beta.

  4. #4
    Junior Member
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    The port select worked perfectly. Thanks

    I just selected the com port. All works now.
    Quote Originally Posted by PaulStoffregen View Post
    Maybe you're seeing this problem? (just a guess, without knowing the actual errors or seeing your screen)

    https://forum.pjrc.com/threads/54608...allation-issue

    If that's what's happening, the solution is simple: just select anything in the Tools > Ports menu. Doesn't matter what you select, even something that's not a board at all (eg, if your computer has bluetooth, it might appear in that menu). Then restart Arduino. This bug is triggered only when nothing has ever been selected. (prior versions of Arduino always had a default - recently it changed)

    Or you could install this beta which has the bug fixed. But if you can select something in the Ports menu, you're probably better off using the stable 1.45 rather than the 1.46 beta.

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