# AttributeError: object 'TaskDialog' has no attribute 'Show' **URL:** \ **Category:** Uncategorized\ **Tags:** dynamo\ **Created:** [December 4, 2023, 1:29pm UTC](https://forum.dynamobim.com/t/attributeerror-object-taskdialog-has-no-attribute-show/96071 "2023-12-04T13:29:14Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![mrl](https://avatars.discourse-cdn.com/v4/letter/m/b487fb/32.png) [@mrl](https://forum.dynamobim.com/u/mrl)\ **Post date:** [December 4, 2023, 1:29pm UTC](https://forum.dynamobim.com/t/attributeerror-object-taskdialog-has-no-attribute-show/96071/1 "2023-12-04T13:29:14Z")
Since today i’m getting an error when i’m running this script in Revit 2023.1 Is was always working for 100% in Revit 2021, 2022, 2023, ending with a dialog. I did no changes for weeks. Does anybody know what’s going wrong? [test pin-palen\_script.dyn](https://forum.dynamobim.com/uploads/short-url/A0FGmaztfQgEQj2pVjqcv6bp4il.dyn) (12,2 KB) ![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/a/7/a76b9cff3798a3fe6f59ea2483684133753a5c8b.png) ```auto import clr #add a reference to the Revit UI .dll so we can access the UI Namespace... clr.AddReference('RevitAPIUI') #import everything from the UI Namespace... from Autodesk.Revit.UI import * #IN Variabele #hoogtes = IN[0] msg = "Elementen met Assembly Code 17.XX (paalfunderingen) zijn nu gepinned." #show the message dialog box... TaskDialog.Show("Bericht", msg) #return a result in Dynamo... OUT = msg ``` UPDATE: After re-installing the packages i get another new error. ☹ Cannot extend an incomplete type ‘MulticastDelegate’. ![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/e/a/ead218f87ea284f3d71494e35ee9a4a05e2db2af.png) ![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/9/a/9a9387b1dd8185ec96c10b3714a12d3402daa8b9.png) ---
**Author:** ![Deniz\_Maral](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/deniz_maral/32/80323_2.png) [@Deniz\_Maral](https://forum.dynamobim.com/u/Deniz_Maral)\ **Post date:** [December 4, 2023, 3:21pm UTC](https://forum.dynamobim.com/t/attributeerror-object-taskdialog-has-no-attribute-show/96071/2 "2023-12-04T15:21:12Z")
I tried your code on Revit 2024 and it works. As far as I can read from warning there might be a problem with Dynamo DLLs. Can you try to re-install Revit? ---
**Author:** ![mrl](https://avatars.discourse-cdn.com/v4/letter/m/b487fb/32.png) [@mrl](https://forum.dynamobim.com/u/mrl)\ **Post date:** [December 5, 2023, 7:42am UTC](https://forum.dynamobim.com/t/attributeerror-object-taskdialog-has-no-attribute-show/96071/3 "2023-12-05T07:42:15Z")
Sorry, can’t do this. Revit is installed in a Citrix-environment for many users. Revit is not on my C-drive. The packages are available via Onedrive in a synchronized folder. It always works, but somehow not on my pc. Probably its a unique user-settings what’s going wrong. I will check my settings again. ---
**Author:** ![mrl](https://avatars.discourse-cdn.com/v4/letter/m/b487fb/32.png) [@mrl](https://forum.dynamobim.com/u/mrl)\ **Post date:** [December 7, 2023, 8:04pm UTC](https://forum.dynamobim.com/t/attributeerror-object-taskdialog-has-no-attribute-show/96071/4 "2023-12-07T20:04:03Z")
Update: I’ve changed my settings en went back again. Still an error. See screenshot. I don’t know how to resolve this. ![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/f/8/f8de1a8e92a58a31a93c69840cc4b94ba2d1ae3a.png) ---
**Author:** ![Deniz\_Maral](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/deniz_maral/32/80323_2.png) [@Deniz\_Maral](https://forum.dynamobim.com/u/Deniz_Maral)\ **Post date:** [December 8, 2023, 9:24am UTC](https://forum.dynamobim.com/t/attributeerror-object-taskdialog-has-no-attribute-show/96071/5 "2023-12-08T09:24:05Z")
Can you try it with IronPython? It seems like CPython3 problem… ---
**Author:** ![haganjake2](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/haganjake2/32/119069_2.png) [@haganjake2](https://forum.dynamobim.com/u/haganjake2)\ **Post date:** [December 8, 2023, 10:45am UTC](https://forum.dynamobim.com/t/attributeerror-object-taskdialog-has-no-attribute-show/96071/6 "2023-12-08T10:45:09Z")
See this post… > [@Python 2 to Python 3 error](https://forum.dynamobim.com/t/python-2-to-python-3-error/95527): > > For this: if dialog.Show() I’m getting an TypeError : No method matches given for show I thought Show was in the taskdialog in Autodesk.Revit.UI which I have loaded: (from Autodesk.Revit.UI import \*) Found this thread: [TaskDialog Problem in Revit 2023](https://forum.dynamobim.com/t/taskdialog-problem-in-revit-2023/84183) But… mine’s not just a simple show… if dialog.Show() == TaskDialogResult.Ok: blergh… re-write time I think. frowning I can’t even seem to change the button! I am stuck with a Cancel button. ---
**Author:** ![mrl](https://avatars.discourse-cdn.com/v4/letter/m/b487fb/32.png) [@mrl](https://forum.dynamobim.com/u/mrl)\ **Post date:** [December 11, 2023, 7:25pm UTC](https://forum.dynamobim.com/t/attributeerror-object-taskdialog-has-no-attribute-show/96071/7 "2023-12-11T19:25:27Z")
Thangs @haganjake2 / @Deniz_Maral Hmm… strange things happens. All my scripts are written in CPython3 and always worked fine. My scripts did always work (on local drive or in Citrix-environment), but somehow not anymore everywhere. This are my results today. Revit 2023.1 on my local drive: script does not work Revit 2023.1 in Citrix-environment: script works (as expected) In both situations; signed in with the same Autodesk-ID ---
**Author:** ![mrl](https://avatars.discourse-cdn.com/v4/letter/m/b487fb/32.png) [@mrl](https://forum.dynamobim.com/u/mrl)\ **Post date:** [December 12, 2023, 7:48pm UTC](https://forum.dynamobim.com/t/attributeerror-object-taskdialog-has-no-attribute-show/96071/8 "2023-12-12T19:48:07Z")
The script works in IronPython2 and IronPython3 The script does not works in CPython3