Microsoft KB Archive/838090

= &quot;Error - Parser Error: Unknown Server Tag ''.&quot; error message when you view an .aspx page in Design view in FrontPage 2003 =

Article ID: 838090

Article Last Modified on 4/27/2004

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APPLIES TO


 * Microsoft Office FrontPage 2003

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SYMPTOMS
In Microsoft Office FrontPage 2003, when you open an .aspx page in Design view, you may receive the following error message:

Error - Parser Error: Unknown Server Tag ' '.

The placeholder for the user control does not appear as expected on the page.



CAUSE
This problem occurs if the .aspx page contains one or more user controls that are located in  tags. FrontPage 2003 incorrectly detects user controls that are located in  tags.



WORKAROUND
To work around this problem, replace the  tags that contain user controls in the .aspx page with   tags. The  tag is rendered as an HTML   element. To replace the  tags in the .aspx page with   tags:
 * 1) Open the Web page that you want to modify.
 * 2) At the bottom of the page, click Code.
 * 3) On the Edit menu, click Find.
 * 4) Click the Replace tab.
 * 5) In the Find what box, type .
 * 6) In the Replace with box, type , and then click Replace. Replace all  tags that contain a user control.
 * 7) In the Find what box, type </asp:Panel>.
 * 8) In the Replace with box, type , and then click Replace. Replace all </asp:Panel> tags that contain a user control.
 * 9) On the File menu, click Save.

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STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.

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MORE INFORMATION
FrontPage 2003 does not support design-time preview of user controls. When you view an .aspx page in Design view and the Web page contains one or more user controls, a box that contains the tag prefix and the tag name appears as a placeholder for the user control. However, if the user control is located in </asp:Panel> tags, FrontPage 2003 does not correctly detect the user control, and you experience the symptoms that are described earlier in the &quot;Symptoms&quot; section.

For more information about FrontPage 2003, visit the following Microsoft Web site:

http://www.microsoft.com/office/frontpage/prodinfo/default.mspx

Keywords: kbpending kbbug kberrmsg KB838090

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