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Error Messages
Visual Studio Error Messages
Solution <name> and its projects must be converted to the current formats.
The project <name> must be converted to the current project format.
One or more projects failed to convert. These projects are now unloaded and marked as unavailable in Solution Explorer. Reload those projects to determine the cause.
<name> cannot shut down because a modal dialog is active. Close the active dialog and try again.
<name> is not a valid project name.
<name> is not a valid solution name.
<number> power closure argument 'n' must be from 1 to 256.
A CLASS name includes characters that are not permitted.
A CLASS name must begin with a period ( . ).
A colon ( : ) is required to separate a property:value pair in a CSS style.
High ASCII or Unicode characters are not permitted in a CSS style rule.
A CSS style rule cannot include non alpha-numeric characters.
A CSS style rule must begin with a selector.
A FORM element cannot be embedded within a parent FORM element.
A pseudo-class name should appear after the colon ( : ) in a CSS style.
The CSS style applied to an HTML element lacks a selector name.
A semicolon ( ; ) is required after a property:value pair in a CSS style.
A string value needs a closing quotation mark ( " or ' ).
A unique ID must begin with a pound sign ( # ).
Add-in <name> cannot be loaded. Remove it from the Add-in Manager?
Add-in <name> caused an access violation. Remove it from the Add-in Manager?
Add-in <name> might not be safe to use from the command line. The add-in might require some user intervention.
Add-in caused an access violation while sinking on <item>. Do you wish to terminate the application?
Alias definition is recursive.
An element name includes characters that are not permitted.
An escape code character ( \ ) is not permitted.
An invalid cookie was passed to UnregisterExtenderProvider().
Another object on this page is already using the ID 'ID.'
Application did not register a class factory for class ID <number>.
Argument is missing escape sequence '\\'.
Argument is missing in the pattern.
Caption cannot be empty.
Character <character> is not valid for alias names.
Character set is missing ']'.
Clipboard cannot be emptied.
Clipboard cannot be opened.
Clipboard format is not valid.
Command <name> does not use arguments or switches.
Command <name> is not valid.
Command allows at most <number> arguments.
Command allows at most one argument.
Command does not accept additional switches or arguments if the switch "/stop" has been specified.
Command does not accept any arguments.
Command does not accept switches.
Command is not available.
Command requires <number> arguments.
Command requires at least <number> arguments.
Command requires at least one argument.
Command requires one argument.
Command was not specified.
Component <name> is busy. Choose Switch To to activate the component and correct the problem.
Component <name> is not responding. Choose Switch To to activate the component and correct the problem.
Component is not correctly registered.
Configuration name contains illegal characters.
Could not access system registry.
No such CSS style rule has been defined for this page.
A CSS style rule does not apply to an HTML element.
Could not change views. Select Options from the Tools menu and check your settings.
Could not complete the action.
Per the active schema, the element '%2' has no attribute '%1'.
Could not insert the selected item at the current location.
Could not open in Design view. A SCRIPT cannot be embedded within a LABEL element.
Could not open in Design view. A SCRIPT cannot be embedded within a LISTING element.
Could not open in Design view. A SCRIPT cannot be embedded within a SELECT element.
Could not open in Design view. A SCRIPT cannot be embedded within a TEXTAREA element.
Could not open in Design view. Place quotes around a '<% %>' block used as an attribute value or within a <SELECT> element.
Could not open in Design view. Reverse or escape quotes inside a '<% ..."value"... %>' block.
Could not open in Design view. There is a duplicate HTML, HEAD, TITLE, or BODY tag.
Could not perform this operation on the current selection. Change the selection and try again.
Could not reformat the document. The original format was restored.
Dialog box requires that you select more than one configuration.
Dialog box requires that you select more than one platform.
Directory or file specified in Look In is not available or does not exist.
Disk <name> is full.
Division by zero.
DLL error. Could not create object with class ID <number>.
Duplicate colon characters ( :: ) are not permitted here.
Duplicate escape characters ( \\ ) are not permitted.
Duplicate periods ( .. ) are not permitted in a CSS style class.
Duplicate pound signs ( ## ) are not permitted in a unique style definition.
Editor <name> is not valid for this file type.
Empty character set [] or [^] was specified.
Enter a valid search string.
Evaluation stack overflow. The pattern may be too complex.
Expected a definition for the @ block.
Expected a semicolon ( ; ) to end the current @ block.
Expected an opening brace ( { ) after the identifier of the current @ block.
Extender instance is no longer valid.
Extender Provider doesn't support either the IExtenderProvider or the IExtenderProviderUnk interfaces.
Extender Provider failed to return an Extender for this object.
File <filename> cannot be created.
File <name> cannot be added to the Toolbox.
File <name> is not a .NET Framework component
File <name> cannot be deleted. The file may currently be used by another application or read-only.
File <name> cannot be registered as an ActiveX component.
File <name> is out of date.
File <name> size is incorrect.
File is currently in use and cannot be overwritten.
File name <name> cannot contain character device names.
File name does not exist or is not valid.
File name or default path is too long.
Full HTML view
Grouped expression is missing ')'.
URLs can be up to 255 characters long. Any additional characters have been deleted.
URLs cannot include 'char.'
The Indent Size must be a number.
Interface is not registered for class ID <number>.
Internal error processing pattern.
Item cannot be added to the Toolbox.
Items cannot be added to a project that is not available in Solution Explorer.
Items cannot be added to a project when multiple or no items are selected in Solution Explorer.
Keyboard mapping scheme could not be saved.
Look In list must contain valid files or folders, separated by semicolons.
Menu captions cannot contain separators.
Miscellaneous Files projects can contain <number> items.
MRU list can contain <number> items.
Multiple pound signs ( ## ) are not permitted in an element ID.
No files were found to look in.
No suitable target for find or other find error.
Object with program ID <number> cannot be created.
Operating system does not match requirements for object with CLSID <number>.
Option is not currently valid.
Out of memory.
Overflow.
Package <name> failed to load.
Path or drive is not valid.
Per the active schema, the element 'element' must be included within a parent element.
Per the active schema, the element 'element1' cannot be nested within 'element2.'
Project type is not valid.
Property value is not valid.
Property value is not valid.
Save changes before you preview the file?
Script Only view
Some components could not be browsed.
Some Unicode characters in this file will not be saved.
String contains too many tagged expressions.
Switch <name> does not allow a value.
Switch <name> is not valid for this command.
Switch <name> requires a value.
Syntax error in pattern.
System DLL <name> could not be loaded.
System information cannot be displayed.
Tab name <name> already exists.
The Tab Size must be a positive integer.
Tagged expression is missing '}'.
Tagged expression number is out of range.
Template <name> is not valid for the selected project.
The .NET Framework debugging services have not been properly installed. The most probable cause is that mscordbi.dll is not registered correctly. Click Help for more information on how to repair your .NET Framework Setup.
The active schema does not support the attribute 'attribute.'
The active schema does not support the element 'element.'
The application cannot run.
The application cannot shut down.
The application cannot start.
The application cannot undo.
The application requires a .dll for class ID <number>.
The Border Size must be a positive integer or zero.
The Cell Height must be an integer greater than zero.
The Cell Padding value must be a positive integer or zero.
The Cell Spacing value must be a positive integer or zero.
The Cell Width must be an integer greater than zero.
A string could not be rendered.
The class file for this Web Form could not be loaded.
The class file for this Web Form was not loaded. Close this view, correct any errors, then reopen the Web Form.
The CSS style class applied to an HTML element is undefined.
The colon ( : ) separator and the value are missing from a property:value pair in a CSS style.
The colon character ( : ) is misplaced in the sequence 'string.'
A list of attribute:value pairs in a CSS style rule has an extra comma ( , ).
The CSS style rule for 'selector' has more than one closing brace ( } ).
The CSS style rule has not changed.
A CSS style rule is blank.
A CSS style rule is missing the name of an attribute.
The CSS style rule for 'selector' is missing the opening brace ( { ) after the selector.
The Document Styles window can apply a maximum of 31 style sheets to an HTML document.
The Document Styles window could not be opened.
Per the active schema, the element 'element' cannot have a closing tag.
The first letter of 'string' cannot be an integer.
The following components could not be browsed:
The Horizontal Space value must be an integer greater than zero.
The ID of an HTML element does not name a defined CSS style.
The Image Height must be an integer greater than zero.
The Image Width must be an integer greater than zero.
A list of attribute values in a CSS style rule must begin with the name of the attribute.
The name of the property is missing from a property:value pair in a CSS style.
The name of the property is missing from a property:value pair in a CSS style.
The Name property cannot include spaces. Enter another value.
The Number of Columns must be an integer between 1 and 99.
The Number of Rows must be an integer between 1 and 99.
The proxy settings on this computer are not configured correctly for Web discovery.
The server element 'element' is missing its closing tag.
The Table Height must be an integer greater than zero.
The Table Width must be an integer greater than zero.
The text in this area cannot be modified.
The value for Margins must be a positive integer or zero.
The value is missing from a property:value pair in a CSS style.
The values for Border/Horizontal/Vertical Spaces must either be positive integers or zero.
The values for Horizontal and Vertical grid spacing must each be 4 pixels or greater. Set the Design View grid size to 4x4 or greater.
The values for Rows and Columns must be positive integers greater than zero.
A value assigned to a property in a CSS style is not permitted.
The values permitted for this attribute do not include 'value.'
The values permitted in this field do not include 'value.' Enter a valid number.
The Vertical Space value must be an integer greater than zero.
The World-Wide-Web Consortium now regards the attribute 'attribute' as outdated. Newer constructs are recommended.
The World-Wide-Web Consortium now regards the element 'element' as outdated. Newer constructs are recommended.
No such @ block has been defined.
There is no class file in the project associated with the Web Forms file 'form'. Create a new class file now?
There is no class file in the project associated with this Web Forms (.aspx) file. Create a new class file now?
A CSS style names an unknown element property.
An undefined CSS style class is assigned to an element.
The ID of an HTML element does not name a defined CSS style.
A CSS element style names an undefined HTML element.
These project configuration(s) are out of date: <configuration>. Would you like to build them?
This application requires Windows NT 4.0 (build <number> with Service Pack <number>), or Windows 95 (build <number> or above).
This document does not yet include a SCRIPT. Add at least one SCRIPT block before switching to Script Only view.
This file is already in use. Any changes you make will not be saved.
This file is protected by source code control. You must check out the file before it can be modified.
This program requires an application for class ID <number>.
This property cannot be edited directly. Use the Style Builder dialog box to make changes.
Tool could not be executed. Please ensure that it points to a valid executable.
Tool requires a name.
Tool requires a title. If you do not want to save this tool, click Delete in the External Tools dialog.
Tool requires a valid executable.
Tool requires a valid executable. If you do not want to save this tool, click Delete in the External Tools dialog.
Toolbox item could not be copied to another tab.
Toolbox will be restored to default state. All custom Toolbox tabs and items will be removed.
Top level menu names cannot contain separators.
Type library <name> was not found.
Unknown argument for ':' operator.
UnregisterExtenderProvider() cannot be used to unregister an Extender Provider that was not registered through RegisterExtenderProvider().
Window menu can contain <number> items.
Within a server element, the element 'element1' is missing its closing tag or overlaps with 'element2.'
Wizard file <name> format is not recognized.
Wizard file <name> is corrupted.
Wizard file <name> is missing a required value.
You can only display this page in HTML view while debugging.
You cannot open an entire frameset in Design view. Open its pages frame by frame.
You cannot use Design view to modify Microsoft Office documents. Use an Office program, or use HTML view.
You must declare @ blocks at the topmost level.
You must implement IExtenderProviderUnk to extend this object.
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Could not open in Design view. Reverse or escape quotes inside a '<% ..."value"... %>' block.

Visual Studio .NET 2003

Before switching to Design view, the HTML Designer examines any code embedded within attribute values or <SELECT> elements. If this message is displayed, both an embedded <% %> block and one or more values inside it are enclosed in the same kind of quotes.

To respond to this message

  • If the embedded '<% %>' block is enclosed in single quotes ('), place double quotes (") around any value that must be quoted inside the block.

    -or-

  • If the embedded "<% %>" block is enclosed in double quotes ("), place single quotes (') around any value that must be quoted inside the block.

    When quoted values inside the <% %> block are enclosed in quotes different from those around the block itself, you can switch to Design view.

Example

In the following markup, an embedded '<% %>' block retrieves the address of a Web page to complete the href attribute of an <a> link element:

Copy 
<a href='<%# fsURL("MyPage") %>'>Go</a>

Here is another valid syntax for the same statement. In this case, double quotes are placed around the embedded "<% %>" block, and single quotes around the parameter 'MyPage' that occurs within the block:

Copy 
<a href="<%# fsURL('MyPage') %>">Go</a>

This enables you to switch to Design view. When you view this page in a Web browser and click this link, the fsURL("MyPage") handler runs.

See Also

HTML Markup: A Element, a Object | HREF Attribute, href Property | SELECT Element, select Object | DHTML References

Embedded Code: Data Binding Expression Syntax | Code Render Blocks | Web Forms Syntax | ASP.NET Syntax | HttpResponse.Write Method | ASP Scripting Optimization

HTML Designer: <A> Property Pages Dialog Box | Options that Affect Existing HTML, CSS, or XML Markup | Web Forms Pages | Web Forms Tab, Toolbox | Editing HTML | Navigating in the Document Outline Window | Switching to Design View

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