topic Re: GetObject is not working in 2025 Beta Version in .NET Forum

GetObject is not working in 2025 Beta Version

serpetfree — Fri, 12 Jan 2024 11:47:12 GMT

Hi,

I need some help.

I've downloaded Civil 3D Vail (2025 Beta version). I've created a simple .NET 8.0 Plugin for AutoCAD 2025. (ClassLibrary)

Here my code:

<Autodesk.AutoCAD.Runtime.CommandMethod("Testgetobject")>

Public Sub Testgetobject()

Dim acAppComObj As Autodesk.AutoCAD.Interop.AcadApplication

Dim strProgId As String = "AutoCAD.Application.25"

acAppComObj = GetObject(, strProgId)

If acAppComObj Is Nothing Then

MsgBox("acAppComObj is Nothing")

else

MsgBox(acAppComObj.ActiveDocument.Name)

End if

End Sub

acAppComObj is Nothing, GetObject is not working

Can anyone help? Why is it not working?

Thanks.

Re: GetObject is not working in 2025 Beta Version

Alfred.NESWADBA — Fri, 12 Jan 2024 11:55:09 GMT

Hi,

should be placed as feedback in the beta-forum.

- alfred -

Re: GetObject is not working in 2025 Beta Version

ntclmain — Wed, 27 Mar 2024 16:21:43 GMT

Now AutoCAD 2025 is released, I think the topic can be opened again.

I got the same error with .Net 8, AutoCAD 2025:

Interaction.GetObject(, "Excel.Application")

return Nothing

As describe here for .Net 8,

https://learn.microsoft.com/en-us/dotnet/api/microsoft.visualbasic.interaction.getobject?view=net-8.0

Interaction.GetObject(, "Excel.Application") should return an opening Excel instance (if any). In fact, it returns Nothing in all cases.

Are there anyone got the same error?

Re: GetObject is not working in 2025 Beta Version

saviour_merlin — Sat, 06 Apr 2024 05:08:22 GMT

We have been using following strings in Autocad 2024 successfully.string progID = "AutoCAD.Application.24.
AcadApplication = (AcadApplication)Marshal.GetActiveObject(progID);
We have downloaded Autocad Architectural 2025 trial version. GetActiveObject is not working it is throwing an Exception.
If I use string progID = "AutoCAD.Application.25";
It throws the exception as
Unable to cast COM object of type 'System.__ComObject' to interface type 'AutoCAD.AcadApplication'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{52EE1CD2-A793-4DEC-9DF9-71CE75881F05}' failed due to the following error: No such interface supported (Exception from HRESULT: 0x80004002 (E_NOINTERFACE)).Please enable GetActiveObject string for 2025.

Re: GetObject is not working in 2025 Beta Version

_gile — Sat, 06 Apr 2024 09:50:06 GMT

Hi,

Marshal.GetActiveobject is only available with .NET Framework (see the bottom of this page).

Re: GetObject is not working in 2025 Beta Version

saviour_merlin — Sat, 06 Apr 2024 10:39:41 GMT

Yes u r right. While I am using my WCF Service it is not working in Autocad 2025. Still Autocad 2024 it was working fine. In Autocad 2025 it is not recognizing the string.

string progID = "AutoCAD.Application.24."
AcadApplication = (AcadApplication)Marshal.GetActiveObject(progID); It throws exception as string

not available

Re: GetObject is not working in 2025 Beta Version

daniel_cadext — Sat, 06 Apr 2024 11:35:43 GMT

Just an FYI, progID 'AutoCAD.Application.25' works from python, so its probably something wrong with .NET or your installation

def PyRxCmd_doit(): try: axApp = Ax.getApp() print(axApp.FullName) except Exception as err: traceback.print_exception(err) #result #C:\Program Files\Autodesk\AutoCAD 2025\acad.exe ##wrappers # # def getApp() -> IAcadApplication: # id = AcadApplication.CLSID # return win32com.client.GetActiveObject(id) # # This CoClass is known by the name 'AutoCAD.Application.25' # class AcadApplication(CoClassBaseClass): # A CoClass # # An instance of the AutoCAD application # CLSID = IID('{363E5B47-885D-44C3-89EB-A2AB2129B57E}') # coclass_sources = [ # _DAcadApplicationEvents, # ] # default_source = _DAcadApplicationEvents # coclass_interfaces = [ # IAcadApplication, # ] # default_interface = IAcadApplication

Re: GetObject is not working in 2025 Beta Version

_gile — Sat, 06 Apr 2024 14:29:52 GMT

It seems possible to P/Invoke GetActiveObject, see this topic.