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Q257409: PRB: "Could Not Start Internet Explorer" Debugging WebClasses

Article: Q257409
Product(s): Microsoft Visual Basic for Windows
Version(s): 2000,6.0
Operating System(s): 
Keyword(s): kberrmsg kbConfig kbOSWin2000 kbVBp600 kbWebClasses kbGrpDSASP kbDSupport
Last Modified: 05-JUN-2001

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The information in this article applies to:

- Microsoft Visual Basic Learning Edition for Windows, version 6.0 
- Microsoft Visual Basic Professional Edition for Windows, version 6.0 
- Microsoft Visual Basic Enterprise Edition for Windows, version 6.0 
- the operating system: Microsoft Windows 2000 
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SYMPTOMS
========

When you run a WebClass (Internet Information Server [IIS] application) from the
Visual Basic Integrated Development Environment (IDE) in Windows 2000, the
following error message appears:

  Could not start Internet Explorer

After you click OK, Internet Explorer does not open.

CAUSE
=====

This behavior occurs only if the "IUSR_<machinename>" account has been
added to the Default Access Permissions in the DCOM security settings. If you
add only the IUSR_<machinename> account, this restricts the default access
permissions for all DCOM servers that use the default permissions.

RESOLUTION
==========

To resolve this problem, remove the IUSR_<machinename> account from the
DCOM Default Access Permissions and follow the instructions in the following
Microsoft Knowledge Base article:

  Q255502 PRB: Server Object Error 'ASP 0178' Occurs When You Run a WebClass in
  Windows 2000

MORE INFORMATION
================

Steps to Reproduce Behavior
---------------------------

On a fresh installation of Windows 2000 (not upgraded from Windows NT4.0), add
IUSR_<machinename> to the Default Access Permissions in DCOM:

1. Start DCOMCNFG: Click Start, click Run, and then type "dcomcnfg" (without the
  quotation marks) in the Run dialog box.

2. On the Default Security tab, click Edit Default in the Default Access
  Permissions frame. The Registry Value Permissions dialog box appears.

3. Add the IUSR_<computername> account to the Registry Value Permissions
  dialog box, and then click OK.

4. Apply the changes and exit the DCOM permissions window.

Create a new IIS Application in Visual Basic, and then click the Start button or
press F5 to run the WebClass.

REFERENCES
==========

For additional information, click the article numbers below to view the articles
in the Microsoft Knowledge Base:

  Q198432 PRB: Server Object Error 'ASP 0178' Instantiating COM Object

  Q192152 PRB: Server Object Error 'ASP 0178 : 800a0005' From WebClasses

Additional query words:

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Keywords          : kberrmsg kbConfig kbOSWin2000 kbVBp600 kbWebClasses kbGrpDSASP kbDSupport 
Technology        : kbOSWin2000 kbVBSearch kbAudDeveloper kbOSWinSearch kbZNotKeyword6 kbZNotKeyword2 kbVB600Search kbVBA600 kbVB600
Version           : :2000,6.0
Issue type        : kbprb

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