System.ObjectDisposedException

[rapture]

When I have the following line of code at the end of my file:

myApp.DefInstance.Close()

I am getting a System.ObjectDisposedException at the end of my program execution. The program works fine except for this issue. When I omit this line I don't get the exception, but the process still exists in Task Manager. Any idea on how to resolve this ?

Thanks

 

[rapture]

Any ideas how to fix or why this may be occuring?

Thanks in advance!

 

[kulrom]

I think you have a problem with using multiple forms ... can you post some code as we could help you? ... meanwhile you can add Try Catch statement in your code and catch the error. Cheers

 

[rapture]

Here is the applicable code. This was once VB6 app upgraded to VB.NET. Please ignore formatting problems of the code during cut and paste. Everything runs fine till it gets to the InstallProgress.DefInstance.Close() part.

Thanks

[size=2][color=#0000ff]Option [/color][/size][size=2][color=#0000ff]Strict [/color][/size][size=2][color=#0000ff]Off[/color][/size]
[size=2][color=#0000ff]Option [/color][/size][size=2][color=#0000ff]Explicit [/color][/size][size=2][color=#0000ff]On[/color][/size]
[size=2][color=#0000ff]Imports[/color][/size][size=2] VB = Microsoft.VisualBasic[/size]
[size=2][color=#0000ff]Imports[/color][/size][size=2] Microsoft.Win32
[/size][size=2][color=#0000ff]Friend[/color][/size][size=2][color=#0000ff]Class[/color][/size][size=2] InstallProgress[/size]
[size=2][color=#0000ff]Inherits[/color][/size][size=2] System.Windows.Forms.Form
 
 
#[/size][size=2][color=#0000ff]Region[/color][/size][size=2] "Windows Form Designer generated code "[/size]
[size=2][color=#0000ff]Public[/color][/size][size=2][color=#0000ff]Sub[/color][/size][size=2][color=#0000ff]New[/color][/size][size=2]()
[/size][size=2][color=#0000ff]MyBase[/color][/size][size=2].New()
 
 
 
 


[/size][size=2][color=#0000ff]If[/color][/size][size=2] m_vb6FormDefInstance [/size][size=2][color=#0000ff]Is[/color][/size][size=2][color=#0000ff]Nothing[/color][/size][size=2][color=#0000ff]Then[indent][/color][/size][size=2][color=#0000ff]If[/color][/size][size=2] m_InitializingDefInstance [/size][size=2][color=#0000ff]Then

 
 
[/color][/size][size=2]m_vb6FormDefInstance = [/size][size=2][color=#0000ff]Me
 
 

[/indent][/color][/size][size=2][color=#0000ff]Else

 
 
[/color][/size][size=2][color=#0000ff]Try[/color][/size][size=2] 
 
 
 
 


[/size][size=2][color=#008000]'For the start-up form, the first instance created is the default instance.[indent][/color][/size][size=2][color=#0000ff]If[/color][/size][size=2] System.Reflection.Assembly.GetExecutingAssembly.EntryPoint.DeclaringType [/size][size=2][color=#0000ff]Is[/color][/size][size=2][color=#0000ff]Me[/color][/size][size=2].GetType [/size][size=2][color=#0000ff]Then[/color][/size]

 
 
[size=2]m_vb6FormDefInstance = [/size][size=2][color=#0000ff]M[/color][/size]
[size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]If
 
 

[/indent][/color][/size][size=2][color=#0000ff]Catch

 
 
[/color][/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]Try
[/color][/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]If
[/color][/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]If
 
[/color][/size][size=2][color=#008000]'This call is required by the Windows Form Designer.
 
[/color][/size][size=2]InitializeComponent()
[/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]Sub
[/color][/size][size=2][color=#008000]'Form overrides dispose to clean up the component list.
[/color][/size][size=2][color=#0000ff]Protected[/color][/size][size=2][color=#0000ff]Overloads[/color][/size][size=2][color=#0000ff]Overrides[/color][/size][size=2][color=#0000ff]Sub[/color][/size][size=2] Dispose([/size][size=2][color=#0000ff]ByVal[/color][/size][size=2] Disposing [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]Boolean[/color][/size][size=2])
[/size][size=2][color=#0000ff]If[/color][/size][size=2] Disposing [/size][size=2][color=#0000ff]Then
[/color][/size][size=2][color=#0000ff]If[/color][/size][size=2][color=#0000ff]Not[/color][/size][size=2] components [/size][size=2][color=#0000ff]Is[/color][/size][size=2][color=#0000ff]Nothing[/color][/size][size=2][color=#0000ff]Then
[/color][/size][size=2]components.Dispose()
[/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]If
[/color][/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]If
[/color][/size][size=2][color=#0000ff]MyBase[/color][/size][size=2].Dispose(Disposing)
[/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]Sub[/color][/size]
 
 
 
 
 
[size=2][color=#0000ff]'Start of sub[/color][/size]
 
[size=2][color=#0000ff][size=2][color=#0000ff]Private[/color][/size][size=2][color=#0000ff]Sub[/color][/size][size=2][color=#000000] InstallProgress_Load([/color][/size][size=2][color=#0000ff]ByVal[/color][/size][size=2][color=#000000] eventSender [/color][/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#000000] System.Object, [/color][/size][size=2][color=#0000ff]ByVal[/color][/size][size=2][color=#000000] eventArgs [/color][/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#000000] System.EventArgs) [/color][/size][size=2][color=#0000ff]Handles[/color][/size][size=2][color=#0000ff]MyBase[/color][/size][size=2][color=#000000].Load[/color]
 
[/size][size=2][color=#008000]
[/color][/size][size=2]InstallProgress.DefInstance.Show()
InstallProgress.DefInstance.Refresh()
 
[/size][size=2]'some code goes here
 
PBar.Value = 10
InstallProgress.DefInstance.Refresh()
 
 
[size=2]Status.Text = "Copying new program files..."
PBar.Value = 40
InstallProgress.DefInstance.Refresh()
 
'some code goes here 
 
 
[size=2]Status.Text = "Importing required windows registry settings..."
PBar.Value = 70
InstallProgress.DefInstance.Refresh()
 
'some code goes here 
 
 
'End of sub
[size=2]InstallProgress.DefInstance.Close()
 
[/size][/size][/size][/size][/color][/size]

 

[kulrom]

Maybe this:

 If m_vb6FormDefInstance Is Nothing OrElse 
m_vb6FormDefInstance.IsDisposed Then
m_InitializingDefInstance = True
m_vb6FormDefInstance = Me
m_InitializingDefInstance = False
End If

instead:

 If m_vb6FormDefInstance IsNothingThen 
If m_InitializingDefInstance Then 
m_vb6FormDefInstance = Me

but i'm not sure this is causing the error ... as i'm not fully familiar with vb6. Only know vb6 equivalents and stuff. But if you decide to unchain yourself from this vb6 code (if i may, sorry if i say something wrong) and if there is anyway i could help you with vb.net code, just let me know ... Cheers