'this._backupCollapsedNodes[...]' is null or not an object

11 posts, 0 answers
  1. Christian
    Christian avatar
    37 posts
    Member since:
    Oct 2007

    Posted 20 Nov 2008 Link to this post

    Hi,
    I am getting the following JScript Error when dropping an node on another one.
    Microsoft JScript runtime error: 'this._backupCollapsedNodes[...]' is null or not an object

    Any Idea?

    Thanx

    [Update]
    This only happens, when the node wich is dragged is empty. If the dragged node contains childnodes, the error does not occur.
    I am using the newest release of the controls.
  2. Christian
    Christian avatar
    37 posts
    Member since:
    Oct 2007

    Posted 21 Nov 2008 Link to this post

    Hi,
    one more addition. It looks like the error occurs when inserting the node clientside: destinationNode.get_nodes().add(sourceNode);
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  4. Christian
    Christian avatar
    37 posts
    Member since:
    Oct 2007

    Posted 25 Nov 2008 Link to this post

    Hello Admins,

    do you have any idea to solve this issue?
    I am really helpless about this.

    Thank you
    Christian
  5. Dimitar Milushev
    Admin
    Dimitar Milushev avatar
    555 posts

    Posted 25 Nov 2008 Link to this post

    Hi Christian,

    Please excuse me for the delayed response.

    The described problem is fixed in the next RadControls Service Pack that will be released this week. I am sorry for the inconvenience.

    Best wishes,
    Dimitar Milushev
    the Telerik team

    Check out Telerik Trainer, the state of the art learning tool for Telerik products.
  6. Christian
    Christian avatar
    37 posts
    Member since:
    Oct 2007

    Posted 25 Nov 2008 Link to this post

    Thank you very much.
    Great support.

  7. Christian
    Christian avatar
    37 posts
    Member since:
    Oct 2007

    Posted 26 Nov 2008 Link to this post

    Hi,
    I just updated to Version 2008.3.1125.35 but the Error still occurs.
    Hmm..
  8. Dimitar Milushev
    Admin
    Dimitar Milushev avatar
    555 posts

    Posted 26 Nov 2008 Link to this post

    Hi Christian,

    This is very strange as we fixed a problem that matches the description you provided. Can you please open a support ticket and send us a project that reproduces the issue so we can debug it locally? That would greatly aid us in resolving this issue quickly.

    All the best,
    Dimitar Milushev
    the Telerik team

    Check out Telerik Trainer, the state of the art learning tool for Telerik products.
  9. Mallverkstan
    Mallverkstan avatar
    20 posts
    Member since:
    May 2007

    Posted 02 Jan 2009 Link to this post

    Hi,  has this been resolved? I am getting the same error. I am using version 2008.3.1125.20 (can't find a version 2008.3.1125.35?).

    It happens after I expand a node, then unexpand it, and then move it to somewhere.

    It might be because I have this function:
    function ClientNodeCollapsed(sender, eventArgs) {   
        var node = eventArgs.get_node();
        tree.trackChanges();    
        node.set_expandMode(Telerik.Web.UI.TreeNodeExpandMode.ServerSideCallBack);
        node.get_nodes().clear();
        tree.commitChanges();
     [...]
    }
    All my nodes are ServerSideCallBack because they have to constantly check for changes.

    Would appreciate a way around the error
    Thanks,
    Fredrik
  10. Atanas Korchev
    Admin
    Atanas Korchev avatar
    8462 posts

    Posted 02 Jan 2009 Link to this post

    Hello Mallverkstan,

    Please open a support ticket and we will send you the hotfix.

    Regards,
    Albert
    the Telerik team

    Check out Telerik Trainer, the state of the art learning tool for Telerik products.
  11. Christian
    Christian avatar
    37 posts
    Member since:
    Oct 2007

    Posted 02 Jan 2009 Link to this post

    after installing version 2008.3.1314.35 it works perfect.
  12. Shane
    Shane avatar
    1 posts
    Member since:
    Nov 2011

    Posted 20 Sep 2012 Link to this post

    The operation I am performing:  client side refresh node using AJAX to RadXmlHttpPanel

    I just upgraded to version 2012.2.912 and I am now getting "'this._backupCollapsedNodes[...]' is null or not an object" error randomly when I try to refresh a node (remove all children, call back to server to get child nodes and then add them to the tree). 

    I was getting "Unable to get value of the property '_getHierarchicalIndex': object is null or undefined" when refreshing the node for which I have not yet seen a response from Telerik that it is fixed so I ended up with a workaround where if I catch that exception, I retry the operation and it always succeeds.


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