Select the product you need help with

FIX: OutOfMemoryException Occurs When You Access Non-Fixed Size Safe Arrays in a User-Defined Type

Article ID: 327107 - View products that this article applies to.

This article was previously published under Q327107

SYMPTOMS

The following error message occurs when you invoke a method on a Component Object Model (COM) object that returns a user-defined type that contains a Safe array (non-fixed size):

An unhandled exception of type 'System.OutOfMemoryException' occurred in ApplicationName.exe

Additional information: Not enough storage is available to complete this operation.

Back to the top | Give Feedback

CAUSE

This behavior occurs because the .NET Framework cannot marshal a structure field with a Safe array (non-fixed size) type.

Back to the top | Give Feedback

STATUS

This bug was corrected in .NET Framework (2003|1.1).

Back to the top | Give Feedback

MORE INFORMATION

Steps to Reproduce the Behavior

Create an ActiveX DLL project in Microsoft Visual Basic 6.0. Paste the following code in the default class module, Class1 (Class1.cls):

Public Type Test
    l As Long
    x() As Integer
End Type

Public Function Func() As Test
    Dim t As Test
    t.l = 100
    Func = t
End Function

Make Project1.dll.
Open Microsoft Visual Studio. NET and then create a Windows Application project in Visual Basic .NET.
Add a reference to Project1.dll.
Add a Button control to Form1.

Copy and then paste the following code after the Windows Form Designer generated code region:

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim c As New Project1.Class1()
        c.Func()
    End Sub