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Q163698: IDC Fails to Execute When Access to Httpodbc.dll Is Denied

Article: Q163698
Product(s): Internet Information Server
Version(s): WINNT: 2.0,3.0
Operating System(s): 
Keyword(s): 
Last Modified: 07-MAY-1999

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The information in this article applies to:

- Microsoft Internet Information Server versions 2.0, 3.0 
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SYMPTOMS
========

When you execute an Internet Database Connector (.idc) file, your browser may
display the following error messages, depending on the authentication method
used:

Allow Anonymous Authentication
------------------------------

  Internet Explorer cannot open the Internet site
  "http://www.yoursite.com/scripts/filename.idc?" The requested
  header was not found.

Basic and Windows NT Challenge/Response Authentication
------------------------------------------------------

A dialog box will prompt you three times for your username and password; then you
will get the following error message:

  Error: Access is denied.

CAUSE
=====

Access to the Httpodbc.dll file is required for the .idc file to execute. If
permissions for the Httpodbc.dll file have been denied to the IUSR_Computername
account for Allow Anonymous access or Microsoft Windows NT users authenticated
with Basic or NT Challenge/Response authentication methods, the .idc file will
fail to execute and generate the above error message.

WORKAROUND
==========

Grant NTFS read/execute permissions to the Httpodbc.dll file for all users who
need to execute .idc files. This includes, but is not limited to the
IUSR_Computername account for Anonymous access and any Windows NT user accounts
using Basic or Windows NT Challenge/Response authentication methods.

NOTE: By default, the Httpodbc.dll file is installed to the following location:

  %SYSTEMROOT%\SYSTEM32\INETSRV\HTTPODBC.DLL
======================================================================
Keywords          :  
Technology        : kbiisSearch kbiis300 kbiis200
Version           : WINNT: 2.0,3.0
Hardware          : ALPHA x86
Issue type        : kbprb

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