I have a big problem with zk and xref and a few more only in zk, but with xref it is very important

i had a room, in this scene i used zk..now i want to load a xref, where i used zk too...than this will happen and the scene is complete destruct..

System.NullReferenceException: Der Objektverweis wurde nicht auf eine Objektinstanz festgelegt.
   bei Ephere.Plugins.Autodesk.Max.Zookeeper.Views.Tree.#=qMpcjQaSPOw5kUZZs3K8S8xaUCpwe1DRWP7seNuXhgZM=(#=qgG$4MvJI9xDgGjPx9_CZ5Q== #=qpn_6V74_7AGJfygKHRZBTg==, Boolean #=qJF0DSQ48WOlUYirkEkhPjg==)
   bei Ephere.Plugins.Autodesk.Max.Zookeeper.Views.Tree.#=qDFprVn9jMefLcv7D67Cf5tblGRDtIVGfF7eGMJ2PJjo=(#=qZWBPDVVMVF4pwio7KikXtw== #=qsXLlsrdJYsvdk0sm8tn$Og==, #=q2bNDtokyYj25l6xgf$l$YEDX4YhQ0$tkv7nQ$QzzcGuPxNtRGqcyB8Rwf_m6APH2 #=qV6XUS0CzERXKn1hoQq$8RA==)
   bei Ephere.Plugins.Autodesk.Max.Zookeeper.ObjectNodeControlMaintainer.#=qPKRowa9hPkXrAAyLPqSgKRz$8zxZwdGJJZP8zrqfme8=(Entity #=qRrwhYMiENBAPxqNnmTeioA==, #=q2bNDtokyYj25l6xgf$l$YEDX4YhQ0$tkv7nQ$QzzcGuPxNtRGqcyB8Rwf_m6APH2 #=qa87E_HFLNdsAdNjMfB6Ppg==)
   bei Ephere.Plugins.Autodesk.Max.Zookeeper.Plugin.CurrentLayerChangedHandler.Invoke(IILayer layer)
   bei Ephere.Plugins.Autodesk.Max.Zookeeper.Entities.ILayer.SetProperty(BooleanProperty property, Boolean value)
   bei Ephere.Plugins.Autodesk.Max.Zookeeper.Views.Tree.#=qNZDOie$Nt4Rb1490r84iDbW1pjsZXxtMiaOMPtndZL4=(#=qZWBPDVVMVF4pwio7KikXtw== #=qKLsKjJBltAfczzf20UbmKw==, ILayer #=qWWTHtQb1mdn0Vl$8AYopSA==, Boolean #=q6gRaHiQ2Mp4_V7$tAGDaxA==)
   bei Ephere.Plugins.Autodesk.Max.Zookeeper.Views.Tree.#=qn8dIzMM5gxiFWioTk$2iAgVVqI5xRbsOwrOWyi1DTW0=(#=qZWBPDVVMVF4pwio7KikXtw== #=qXIsLanyD$6tlUuXnA0nj3Q==, Point #=qJdCRg7MwgxtYpilfpSkvFQ==)
   bei Ephere.Plugins.Autodesk.Max.Zookeeper.Views.Tree.#=qHqJN8dFz7z1cczT9YjgbSXZ$ueuK9i$2gmOrk0VpjBg=(MouseEventArgs #=q3y_w666TGR3eQnl09XWddg==, #=qZWBPDVVMVF4pwio7KikXtw== #=q$vsTALjjh7q6$yLXULG2Rg==, #=qyEGkeTx2LuPsw1k82buqlw== #=qU6ii7VFDPzFyPb8LTbePUQ==)
   bei #=qps3vQHFXY3tG9eNRW4hDOBfq2gwFqc$jFBSpbKkZbrg=.OnMouseDown(MouseEventArgs #=qaLM3QG5YWkH8bmwQ2oJo0g==)
   bei Ephere.Plugins.Autodesk.Max.Zookeeper.Views.Tree.OnMouseDown(MouseEventArgs #=qHVt_oHdSnjh59VsFf7_MpQ==)
   bei System.Windows.Forms.Control.WmMouseDown(Message& m, MouseButtons button, Int32 clicks)
   bei System.Windows.Forms.Control.WndProc(Message& m)
   bei System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

so now i thought it depends on the zkanchor..so i reset the zk in the xrefscene and loaded it into the roomscene...nothing happened, so it is not possible to see the layers of the xref file in the zk...but there are in the layer manager of max..

the same problem is the same with merging files..i canat merge two scene with zk..zk is not able to show all files than..

that's real big problem, because we always work with xref and of course zk..

so now to the small problem:

-if you delete nodes in the schematic view than they are not deleted..that is great..something like hiding..but the problem is, if you make a new not on the node, where you delete (hide) the last node, zk will make a new node..if you delete, you first have to refresh to see, that there is something in the node...

-a few more will come in future, but now i have to make the project:)