Posts: 3
Registered: ‎04-05-2012
Message 1 of 4 (295 Views)

AutoCad 2011 Not Open

295 Views, 3 Replies
04-05-2012 06:44 PM

I'm CAD Addin developer.
Um ...
AutoCAD 2010 OPEN success.
AutoCAD 2012 OPEN success.
But .... AutoCAD 2011 OPEN failure.

AutoCAD 2010, 2011, 2012 all same source.
Why Not OPEN AutoCAD 2011 ... TT.

DWGCHECK applied ...

Dev Tool: Visual Studio 2008
CAD: AutoCAD Mechanical 2011


Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim acadApp As AcadApplication

            If acadApp Is Nothing Then
                acadApp = GetObject(, "AutoCAD.Application")
            End If
            acadApp.Visible = Visible

        Catch ex As Exception
                acadApp = CreateObject("AutoCAD.Application.18.1")
                acadApp.Visible = Visible
                'Shell("C:\Program Files\Autodesk\ACADM 2011\acad.exe")
                acadApp.Visible = Visible
            Catch ex1 As Exception
            End Try
        End Try
    End Sub

Valued Contributor
Posts: 95
Registered: ‎04-04-2012
Message 2 of 4 (293 Views)

Re: AutoCad 2011 Not Open

04-05-2012 06:48 PM in reply to: ywseo

Did you try debugging it?

In which line do you get the error?

Valued Mentor
Posts: 277
Registered: ‎11-29-2008
Message 3 of 4 (289 Views)

Re: AutoCad 2011 Not Open

04-05-2012 07:32 PM in reply to: ywseo


acadApp = CreateObject("AutoCAD.Application.18.1")


are you accessing










Everything will work just as you expect it to, unless your expectations are incorrect.

class keyThumper<T> : Lazy<T>;      another  Swamper

ADN Support Specialist
Posts: 749
Registered: ‎03-21-2011
Message 4 of 4 (272 Views)

Re: AutoCad 2011 Not Open

04-06-2012 04:54 AM in reply to: ywseo



Using the version independent program id as “AutoCAD.Application” should invoke the last run version of AutoCAD.


So you may want to check which version of AutoCAD was invoked just before you run this code.

If not you can mention the prog id of a AutoCAD version that you specifically want to launch.

Ex : “AutoCAD.Application.18.1” for AutoCAD 2011.


Using the registry editor open the following key and note the CLSID :



For ex : If the CLSID is “6D7AE628-FF41-4CD3-91DD-34825BB1A251”

Look for  “HKEY_CLASSES_ROOT\CLSID\{6D7AE628-FF41-4CD3-91DD-34825BB1A251}\LocalServer32”


The path to the executable that will be launched when “AutoCAD.Application” is specified can be verified here.


Be careful while working with the registry editor.



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