Article ID: 870722
Article Last Modified on 4/7/2006
APPLIES TO
- Microsoft .NET Framework 1.0
- Microsoft .NET Framework 1.1
SYMPTOMS
When a duplicate import schema is encountered during compilation, System.xml may throw the following error message:
Notes
- In the previous error message,
C:/C.xsdis the duplicate schema. - This hotfix cannot be applied on a system that is running the Microsoft .NET Framework 1.1 Service Pack 1. If you installed the .NET Framework 1.1 Service Pack 1 and are experiencing the symptoms that are described in this article, request the hotfix rollup package that is described in Microsoft Knowledge Base article 890673 to obtain a resolution. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
890673 Availability of the .NET Framework 1.1 Post-Service Pack 1 XML Web services and XML Messaging hotfix rollup package 8
RESOLUTION
Although this problem occurs in both the Microsoft .NET Framework 1.0 and in the .NET Framework 1.1, this resolution only applies to the .NET Framework 1.1.
To apply this hotfix, your computer must be running the .NET Framework 1.1.
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Microsoft .NET Framework 1.1 service pack that contains this hotfix.
To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:
Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question. The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
Date Time Version Size File name
--------------------------------------------------------------
29-Jun-2004 02:42 1.1.4322.1059 258,048 Aspnet_isapi.dll
29-Jun-2004 02:42 1.1.4322.1059 20,480 Aspnet_regiis.exe
29-Jun-2004 02:42 1.1.4322.1059 32,768 Aspnet_state.exe
29-Jun-2004 02:42 1.1.4322.1059 32,768 Aspnet_wp.exe
14-Jun-2004 21:45 33,718 Installpersistsqlstate.sql
14-Jun-2004 21:45 34,342 Installsqlstate.sql
14-Jun-2004 21:45 35,243 Installsqlstatetemplate.sql
24-May-2004 23:04 1.0.3705.0 106,496 Netfxupdate.exe
29-Jun-2004 02:42 1.1.4322.1059 94,208 Perfcounter.dll
24-May-2004 23:04 1.1.4322.573 102,400 Setregni.exe
14-Jun-2004 21:45 8,685 Smartnav.js
29-Jun-2004 02:42 1.1.4322.1059 1,224,704 Sy52106.dll
29-Jun-2004 02:42 1.1.4322.1059 241,664 System.messaging.dll
29-Jun-2004 02:42 1.1.4322.1059 323,584 System.runtime.remoting.dll
29-Jun-2004 02:42 1.1.4322.1059 131,072 System.runtime.serialization.formatters.soap.dll
29-Jun-2004 02:42 1.1.4322.1059 1,257,472 System.web.dll
29-Jun-2004 02:42 1.1.4322.1059 819,200 System.web.mobile.dll
29-Jun-2004 02:42 1.1.4322.1059 569,344 System.web.services.dll
29-Jun-2004 02:42 1.1.4322.1059 1,339,392 System.xml.dll
24-May-2004 23:04 1.1.4322.573 118,784 Togac.exe
14-Jun-2004 21:45 2,119 Uninstallsqlstatetemplate.sql
14-Jun-2004 21:45 14,482 Webuivalidation.js
STATUS
Microsoft has confirmed that this is a bug in the Microsoft products that are listed in the "Applies to" section.
MORE INFORMATION
This problem may occur when you compile a duplicate schema, such as the following:
A.xsd imports B.xsd and C.xsd, and then B.xsd also imports C.xsd.
Steps to reproduce the problem
- Create a Microsoft Visual Studio .NET 2003 or a Visual Studio .NET 2002 Windows Forms application.
- Add a button to the default form.
Add the following methods to the default Form class
void LoadSchemas() { try { //A.xsd imports B.xsd and C.xsd, and then, B.xsd imports C.xsd. XmlSchema schemaA = LoadSchema(@"C:\A.xsd"); schemaA.Compile(null); XmlSchema schemaC = ((XmlSchemaExternal)schemaA.Includes[0]).Schema; XmlSchema schemaB = ((XmlSchemaExternal)schemaA.Includes[1]).Schema; ((XmlSchemaExternal)schemaB.Includes[0]).Schema = schemaC; schemaA.Compile(new ValidationEventHandler(ValidationCallBack)); } catch(Exception ex) { MessageBox.Show(ex.Message); } } internal void ValidationCallBack(object sender, ValidationEventArgs args) { System.Diagnostics.Debug.WriteLine(args.Message); MessageBox.Show(args.Message); } static XmlSchema LoadSchema(string fileName) { XmlTextReader xmlTxtReader = null; XmlSchema xmlSchema = null; try { xmlTxtReader = new System.Xml.XmlTextReader(fileName); xmlSchema = XmlSchema.Read(xmlTxtReader, null); } finally { if (xmlTxtReader != null) xmlTxtReader.Close(); } return xmlSchema; }Change the button1_Click event handler as follows:
private void button1_Click(object sender, System.EventArgs e) { LoadSchemas(); }- Run the application.
You may receive the error message that is mentioned in the "Symptoms" section.
Keywords: kbqfe kbhotfixserver kbbug kbfix KB870722
