I am trying to write a bit of code that will batch get library files when needed. I found and modified some code on this forum to do exactly this, but it doesn't seem to work for me. This is on EPDM 2012 SP3. Using Visual Studio 2010, C#. I am getting and invalid arguement exception on bg.AddSelection. Anyone care to take a look at it?

            EdmVault5 vault = new EdmVault5(); ;
       
          // Change "My Vault" to your vault name
        vault.LoginAuto("My Vault", 0);
  
        // Change the number 2 in the following line to match the number of folders
        EdmSelItem[] folders;
        folders = new EdmSelItem[2];
  
        // The folders array index starts with 0.
        // mlDocId = 0 tells EPDM you want all the files in the folder
        folders[0].mlDocID = 0;
        folders[0].mlProjID = vault.GetFolderFromPath("C:\\My Vault\\Library").ID;
        folders[1].mlDocID = 0;
        folders[1].mlProjID = vault.GetFolderFromPath("C:\\My Vault\\Misc").ID;
         IEdmBatchGet bg;
        bg = vault.CreateUtility(EdmUtility.EdmUtil_BatchGet);
        bg.AddSelection(vault, folders);
        bg.CreateTree(0, 8);
        bg.GetFiles(0, null);