Microsoft KB Archive/272631

= PRB: VS6 - Unable to Register MSDASQL.DLL in System Registry When Updating System =

Article ID: 272631

Article Last Modified on 3/3/2003

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APPLIES TO


 * Microsoft Visual Studio 6.0 Service Pack 1
 * Microsoft Visual Studio 6.0 Service Pack 2
 * Microsoft Visual Studio 6.0 Service Pack 3

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This article was previously published under Q272631



SYMPTOMS
When you install Visual Studio 6.0 or one of its products, the following error message appears when you update the system:

Unable to register MSDASQL.DLL in system registry



CAUSE
Dependencies of the file are not in sync or they are missing.



RESOLUTION
To resolve this problem:

On Microsoft Windows 95 and Microsoft Windows 98 systems:
 * 1) Search for Comcat.dll, which should be under C:\windows\system\. Ensure that you have version 4.71. To do this:
 * 2) * Right-click on the file that you find, select Properties, and then select the Version tab.
 * 3) If you have any version other than 4.71, replace the C:\windows\system\ copy with one from the Visual Studio product CD ROM.
 * 4) On the Start menu, select Run, type regsvr32 Comcat.dll, and then click OK to register the file.
 * 5) When a message box appears indicating that the message completed successfully, click OK.

On Microsoft Windows NT 4.0 systems:
 * 1) Search for Comcat.dll, which should be under C:\windows\system32\. Ensure that you have version 4.71. To do this:
 * 2) * Right-click on the file that you find, select Properties, and then select the Version tab.
 * 3) If you have any version other than 4.71, replace the C:\windows\system32\ copy with one from the Visual Studio product CD ROM.
 * 4) On the Start menu, select Run, type regsvr32 Comcat.dll, and then click OK to register the file.
 * 5) When a message box appears indicating that the message completed successfully, click OK.

For all platforms:  Update your version of MDAC to version 2.6 or greater. Updates are available on the following Microsoft Web site:

http://msdn.microsoft.com/dataaccess

 Search the local hard drive for MSDASQL.dll and rename any that you find to MSDASQL.123. Re-install the Visual Studio Product.

