Microsoft KB Archive/243623

= Errors Occur with Source Control Integration When Checking Out Files =

Article ID: 243623

Article Last Modified on 2/22/2007

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APPLIES TO


 * Microsoft FrontPage 2000 Server Extensions
 * Microsoft Visual SourceSafe 5.0 Standard Edition
 * Microsoft Visual SourceSafe 6.0 Standard Edition

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This article was previously published under Q243623



SYMPTOMS
When you attempt to check out a file in a FrontPage extended Web, you receive the following error message:

Unable to check out the file 'file.htm'. Server Error: There is a problem with source control integration on your server. Contact your web server Administrator.

Do you want to open a read only copy?

If the LogInitialSourceControlErrors registry key is enabled, the following error message appears in the Application event log:

Microsoft FrontPage Server Extensions:

(OS Error #-2147167977 Message: )

Microsoft FrontPage Server Extensions:

http://server1 - Error #90017 Message: Source Control System failure: The SourceSafe database path \\server2\vss\data does not exist. Please select another database.

For additional information, see the following article or articles in the Microsoft Knowledge Base:

238252 Enable Event Error Logging for FrontPage 2000 and SourceSafe



CAUSE
This problem occurs because the Visual SourceSafe database is on another computer, and the Web server is using Windows NT Challenge/Response (NTLM) authentication. Because the database is on another computer, NTLM cannot, by design, forward your credentials. NTLM only works over the first hop (client to Web server).



WORKAROUND
Enable Basic authentication on the Web server, and do not use NTLM. To do this on a computer running IIS, follow these steps:
 * 1) Click Start and then point to Programs.
 * 2) Point to Windows NT 4.0 Option Pack, and then point to Microsoft Internet Information Server.
 * 3) Click Internet Service Manager.
 * 4) Right-click the Web site, and then click Properties.
 * 5) Click the Directory Security tab.
 * 6) Click the Edit button for Anonymous Access and Authentication Control.
 * 7) Click to check the Basic Authentication check box.
 * 8) Click to uncheck the Windows NT Challenge/Response check box.
 * 9) Click OK twice.

Additional query words: front page

Keywords: kbprb KB243623

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