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Forums / Deployment / browserfile.browser error: Data at the root level is invalid. Line 1, position 1

browserfile.browser error: Data at the root level is invalid. Line 1, position 1

4 posts, 0 answered
  1. Mikael Kleinwort
    Mikael Kleinwort avatar
    78 posts
    17 May 2004
    24 Apr 2009
    Link to this post
    I have had a strange error after deploying my SF project to the production server for the first time. I found a solution and I would like to post it here in case others encounter the same. I also hope that the SF team may look at it and prevent it from happening in the first place.

    All was working fine on the development machine.

    Then I created a new website on the server and enabled Frontapge extensions on it so I can copy the website using VS Studio 2008, and I deployed the website to the server. When I want to open the website or the SF lgin page, I get an error in 


    with the message

    "Data at the root level is invalid. Line 1, position 1"

    It turns out that probably the Frontpage extensions create a hidden folder


    and in it is another file also called "BrowserFile.browser".

    After I deleted this folder, the error went away.

    If "BrowserFile.browser" is being changed on the development machine and then reposted to the production server through VS Studio, the _vti_cnf folder is created again, but the problem does not occur anymore. It only occurs on the first post to the server. FPSE stoes the old file versions in the _cti_cnf folder, and on the first post, it has no old version but writes some configuration data into the file located in the _vti_cnf folder. For some reason, this confuses the wesite.

    Hope this helps others.
    Regards, Mikael

    Regards, Mikael
  2. Sonya
    Sonya avatar
    231 posts
    24 Sep 2012
    28 Apr 2009
    Link to this post
    Hello Mikael Kleinwort,

    Thank you for sharing this information with all members of the community.

    All the best,
    the Telerik team

    Instantly find answers to your questions on the new Telerik Support Portal.
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  3. Anthony
    Anthony avatar
    10 posts
    15 Aug 2008
    09 Jun 2009
    Link to this post
    That worked for me also, thank you :-)
  4. JJ
    JJ avatar
    2 posts
    05 Apr 2007
    08 Jun 2010
    Link to this post
    THANK YOU!!!
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4 posts, 0 answered