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How to: Fixing “Unable to install application” error on N900

If you delved into the realms of “Extras Testing” applications, an app there may possibly have caused a fault in your N900 giving you “Unable to install __insert__app_name” errors. Since Christmas day I’ve been unable to find the answers to fix

  • Unable to install ‘Bounce Evolution’
  • Unable to install ‘Hermes’
  • Unable to install ‘MooBox’ etc.

Reinstallation/formatting memory card did not work.

Thanks to Jon Shipman’s reply in my plea post “How to Hard Reset your N900?” [not a tutorial] there’s now a working solution! By following the simple steps below (it’ll take a couple of minutes], you’ll be able to install applications again.

  1. From your N900′s Web Browser go to http://maemo.org/downloads/product/Maemo5/rootsh/
  2. Download that file and install it (you may have to find the download using file manager. Once you open this file, App Manager will take care of installation)
  3. Open X Terminal on your N900
  4. Type
      • sudo gainroot
    • You’ll see “BusyBox v1.10.2 …../home/user #”
  5. Type
    • cd /home (not sure if this part’s necessary, I don’t understand this all, but this is how I got it to work)
  6. Type
    • mkdir opt
    • Refresh application catalogue in download. You’re done!
    • I was unable to reinstall “MooBox” before, but now it’s back. And so will a whole bunch more other apps now this error has been fixed.

    Many thanks again Jon!

    Now if the “unable to install error” was self inflicted by extras testing app, you’ll know to be more careful. If you ever do come into similar problems again however, you’ll know what to do. (Hopefully nothing worse than this)


    1. john
      January 5, 2010 at 3:31 am | #1

      yes this is because some crap software you installed did not un-install right
      that the problem with the test install software

    2. vish
      January 16, 2010 at 7:13 am | #2

      as i am unable to install apps, when i open the file rootsh, it also hangs in between ! “preparing for installation, please wait”
      Everytime i try to install any app it just hangs in between this screen. installation bar is highlighted till “preparing for insta” with orange color (as my theme is digital nature)and then it hangs ! and ultimately i have to stop it !

      please help !
      thanks

      • Bob
        April 10, 2010 at 4:28 pm | #3

        i have the same problem.. did you find out how to fix it yet?

        • muzzee
          April 23, 2010 at 9:01 pm | #4

          i also have the same problem did u fix it ???

          • klelk
            April 23, 2010 at 10:48 pm | #5

            me too, any ideas what to do?

    3. February 2, 2010 at 3:27 am | #6

      Hi there.
      Thank you for a great post. It was very helpfull.
      Anyone reading this post should bookmark this guys contents.

      I have a new PC and needed some installation help so i went over to http://www.InstallSoftware.com but they did not provide me with the in depth
      info this guy did. he kicks all the bigger sites’ butts.

      Thanks Again

    4. jürgen
      February 12, 2010 at 10:31 am | #7

      I am sure ‘rootsh’ is a wonderful thing. If I only would not always get the following error message: “Unable to install ‘rootsh’”
      I downloaded rootsh 1.5 via appl.manager. log-file says: apt-worker: Not handling unrelated package recorder. required disk space: 3156
      thank you for your help! kind regards from freezing germany j.

    5. holger
      April 1, 2010 at 9:51 am | #8

      Thanks a lot. This great post let me get rid of an immensely annoying problem, making the N900 almost useless for me. Checking the logfile after those interrupted installations I could see the problem had something to do with ‘opt’, but I could not figure out the fix. Thanks again!

    6. Hasnain
      April 7, 2010 at 9:12 am | #9

      I am trying to install VOIP applications on my N900, but the application manager menu does not show the downloaded files. please help

      • April 7, 2010 at 9:17 am | #10

        What VoIP applications might they be? Some applications can only be initiated from X-terminal.

        Alternatively there’s Skype by default on N900.

    7. jürgen
      April 14, 2010 at 10:06 am | #11

      thank you for this little tutorial!
      but I do not succeed with step 1.
      N900 says: unable to install “rootsh”.

      what can I do?
      tyvm
      jürgen from ulm, germany

      • April 14, 2010 at 10:11 am | #12

        Hi there.

        One solution maybe to follow this tutorial: http://mynokiablog.com/2010/01/03/how-to-hard-reset-nokia-n900. This will also stop you from ever needing to install rootsh if you reset/reinstall firmware on your N900.

        The link has been updated and will bring back the N900 as to how it was when you first bought it. Also, if you make a backup, it will bring back all your settings/widgets/contacts so it’s like nothing happened to it.

        You can manually choose which apps to reinstall too.

        Just make sure you backup onto a memory card and not the Mass Memory as that will get wiped.

        Good luck.

    8. Phayeser
      May 23, 2010 at 1:17 am | #13

      dunno what the hell all this is about but it seemed to work for me :)

    9. Phayeser
      May 23, 2010 at 2:37 am | #14

      correction: it left me with an almost full space for applications, then I used this one to flash again successfully:
      http://mynokiablog.com/2010/01/03/how-to-hard-reset-nokia-n900/

      if I can do it anyone can:()

    1. January 5, 2010 at 9:24 am | #1