BUG: "Not all of the windows in the workspace could be opened" error message when you try to open a workspace in Visual C++ 6.0

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Steps to reproduce the behavior

1. Ensure that the WizardBar is active by selecting Customize from the Tools menu and then selecting the ToolBars tab. In the Toolbars list box, make sure that the WizardBar item is checked. Dismiss the Customize dialog box by clicking OK.
2. From the File menu, select New. Select the Workspaces tab and the Blank Workspace list item. Specify a workspace name and location. Click OK on the New dialog box.
3. From the File menu, select New. Select the Projects tab and the MFC AppWizard (exe) list item. Specify a project name and select the Add to current workspace button.
   
   Note The default storage location for the project being created is a subdirectory of the directory containing the workspace file. Do not change this.
   
   Click OK on the New dialog box, click Finish on the MFC AppWizard - Step 1 dialog box, then click OK to dismiss the New Project Information dialog box.
4. Open one or more source files from the newly created project.
5. Close and reopen the workspace.