Why do I get an intermittent error saying Internal ID is not pointing to a folder anymore. Consider using external IDs.?
A. The tree control on the left-hand side (TreeView) has a configuration variable called PERSERVESTATE (unfortunate mispelling) or PRESERVESTATE. Both spellings of this variable are supported. This configuration variable tells the TreeView to remember its state the next time you load the page. So, in other words, when you go back to the WebFileBrowser page, the TreeView will open the folders that you had open last time. What it basically does is store the IDs of the open folder nodes in a cookie and retrieve the information the next time you load the page. However, if the tree structure changes in the mean time, the folder IDs will change. And then the TreeView will attempt to open an inappropriate folder ID. This could happen when your folders are changing frequently, which sometimes happens in the development phase of a project. If this happens and you expect your folders to be stable after deployment of your page, then you need not worry about this issue.
