Microsoft KB Archive/175802

= PRB: Query Error: Class Not Registered =

Article ID: 175802

Article Last Modified on 5/2/2006

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APPLIES TO


 * Microsoft Visual InterDev 1.0 Standard Edition
 * Microsoft Visual Database Tools

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This article was previously published under Q175802



SYMPTOMS
When you attempt to open the Query Designer, one of the following errors appears:

The Query cannot be executed because some files are either missing or not registered. Run Setup again to make sure the required files are registered.

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Query Designer encountered a Query error: Class not registered

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Cannot create or open this document

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Unable to output this table



CAUSE
The Visual Database Tools DLLs or one of their dependencies are not registered correctly or are not in the correct folder.



RESOLUTION
Make sure the following DLLs are located in the proper folder and that each one is properly registered:   \DevStudio\MSDesigners:      mdtqd.dll mdtqodb.dll   \Winnt\System32:      msrdo20.dll 

To register the files, use RegSvr32. For example, to register Mdtqd.dll, you would click the Start menu and type the following into the Run dialog box:

regsvr32 "c:\Program Files\DevStudio\MSDesigners\mdtqd.dll"



STATUS
This problem has been resolved in Visual InterDev 6.0.



Steps to Reproduce Behavior

 * 1) Open a Web project in Visual InterDev that contains a data connection.
 * 2) Double-click on a table in the Data View.

If the Query Designer DLLs or their dependencies are not properly registered, one or more of the errors described in the SYMPTOMS section above will appear.

