FIX: "COMException - Type Mismatch" Error Message When You Pass a VARIANT Parameter from Managed Code
This article has been archived. It is offered "as is" and will no longer be updated.
If you call a Microsoft Foundation Classes (MFC) ActiveX control method that has a parameter of type VARIANT* from managed code, the call fails and you receive the following error message:
COMException - Type Mismatch
This problem occurs because you cannot pass a VT_VARIANT | VT_BYREF VT type VARIANT parameter from managed code. Typically, this problem affects MFC ActiveX controls and automation servers that use the VARIANT* type parameter in method calls.
To resolve this problem, obtain the hotfix installation package for the Microsoft .NET Framework 1.1. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
817703 INFO: Combined Installation Package for the .NET Framework 1.1 - Hotfixes 818981, 818982, and 822878
Hotfix InformationA supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next .NET Framework Version 1.1 service pack that contains this hotfix.
To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.
The English version of this fix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
Date Time Version Size File name -------------------------------------------------------------- 23-Oct-2003 00:48 1.0.3705.465 200,704 Aspnet_isapi.dll 23-Oct-2003 00:02 1.0.3705.465 69,632 Corperfmonext.dll 23-Oct-2003 00:01 1.0.3705.465 303,104 Mscorjit.dll 23-Oct-2003 23:56 1.0.3705.465 1,953,792 Mscorlib.dll 23-Oct-2003 00:01 1.0.3705.465 2,273,280 Mscorsvr.dll 23-Oct-2003 00:02 1.0.3705.465 2,269,184 Mscorwks.dll 23-Oct-2003 00:46 1.0.3705.465 20,480 Perfcounter.dll 23-Oct-2003 23:49 1.0.3705.465 1,179,648 System.data.dll 23-Oct-2003 23:56 1.0.3705.465 1,695,744 System.design.dll 23-Oct-2003 23:48 1.0.3705.465 1,175,552 System.dll 23-Oct-2003 23:47 1.0.3705.465 241,664 System.messaging.dll 23-Oct-2003 23:47 1.0.3705.465 311,296 System.runtime.remoting.dll 23-Oct-2003 23:42 1.0.3705.465 131,072 System.runtime.serialization.formatters.soap.dll 23-Oct-2003 23:49 1.0.3705.465 1,196,032 System.web.dll 23-Oct-2003 23:47 1.0.3705.465 507,904 System.web.services.dll 23-Oct-2003 23:56 1.0.3705.465 1,994,752 System.windows.forms.dll 23-Oct-2003 23:49 1.0.3705.465 1,302,528 System.xml.dll
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section of this article.
Article ID: 818982 - Last Review: 01/17/2015 07:13:08 - Revision: 3.0
Microsoft .NET Framework 1.1
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