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Thread: error prefix not set

  1. #1
    Join Date
    May 2011
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    2

    error prefix not set

    I installed from wubi when I restarted and went to boot up ubuntu I got the error prefix not set.

    wn7 64

    please help

  2. #2
    Join Date
    Mar 2010
    Location
    India
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    8,175
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: error prefix not set

    Did you search WUBI megathread? See this post: http://ubuntuforums.org/showthread.p...3#post10771873

    According to the above post by bcbc (expert in WUBI),
    In terms of warnings/messages, there's the one grub boot message about the "prefix not being set". This is new in Natty, but it is a known issue and harmless.
    So what happens after getting this message? Posting the exact error messages would be helpful.
    Varun
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  3. #3
    Join Date
    May 2011
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    2

    Re: error prefix not set

    it throws me to grub command prompt

  4. #4
    Join Date
    Mar 2010
    Location
    India
    Beans
    8,175
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: error prefix not set

    Well, for best advice, bcbc is your man! Follow these links and his suggestions to see if any works for you:
    https://answers.launchpad.net/wubi/+question/154912
    https://answers.launchpad.net/wubi/+question/144942
    http://ubuntu-with-wubi.blogspot.com/
    Varun
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  5. #5
    Join Date
    May 2011
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    2

    Re: error prefix not set

    hi cure2001 have you sorted this error...!!! I started receiving 2 days ago

  6. #6
    Join Date
    Mar 2010
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    8,254
    Distro
    Ubuntu 10.04 Lucid Lynx

    Re: error prefix not set

    Quote Originally Posted by tj4linux View Post
    hi cure2001 have you sorted this error...!!! I started receiving 2 days ago
    Did you check the possible solutions in the links provided by varunendra?

  7. #7
    Join Date
    May 2011
    Beans
    2

    Re: error prefix not set

    I saw them... but i didnt tried them yet... I dont know if they will work... or trying them should not lend me with some other issues..

  8. #8
    Join Date
    Nov 2009
    Location
    North Vancouver
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    Hidden!
    Distro
    Edubuntu 14.04 Trusty Tahr

    Re: error prefix not set

    This error message was reported to the developer and he stated that it wasn't causing any problems and he wasn't going to try to fix it (in case something broke in the attempt). See comment 28 and 29 here.

    My natty wubi install(s) have all reported this "error" on every startup.

    So... I think there is likely some other problem and you're assuming it has something to do with this error message.

    My steps to trouble shoot would be:
    If you don't see the grub menu
    ==============================
    1. confirm that the file \ubuntu\disks\root.disk exists or find it (search by name and/or size since windows chkdsk will sometimes rename files it considers corrupted)
    2. back it up once you find it
    3. run chkdsk on windows.
    4. if you still can't boot, boot a current Ubuntu CD ("Try it" without installing) and fsck the root.disk.

    If you see the grub menu but booting fails
    ==========================================
    1. Try the recovery mode and try to repair if that works
    2. Try an older kernel if you have one available
    3. Boot a current Ubuntu CD and run the bootinfoscript results, then post them on a new thread asking for help if you can't get it working.

  9. #9
    Join Date
    Sep 2011
    Beans
    2

    Re: error prefix not set

    For what is worth, I was having the same issues after having Ubuntu 11.0.4 up and running for over a month. After looking at the files system under Windows I noticed that my root.disk file had 0 bytes. Something, either Windows 7 or Ubuntu itself, corrupted the file. Luckily I had a backup of my computer including my ubuntu install so I was able to recover by replacing the bad root.disk file with a previous version. Hopefully this information would throw some light into this problem.

  10. #10
    Join Date
    Jul 2011
    Beans
    1

    Re: error prefix not set

    OK I had this same error. I do not know what but their is something wrong with the new wubbi the orange one. I had to install Ubuntu 11.04 from the old wubbi and then get the upgrade. The reason my computer crashed and burned earlier is because I was working with the split command trying to learn more about the terminal and large text files. Then it crashed i rebooted and then got the message prefix not set. Frustrating.

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