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FIX: Breakpoint does not work correctly on a .line directive that does not have a column range in the .NET Framework 1.1

In the Microsoft .NET Framework 1.1, if a breakpoint is set on a statement that is related to a .line directive that does not contain a column range, the debugger will move to the next .line directive. This behavior occurs when the following conditions are true:
  • The first .line directive has no column range.
  • The second .line directive has a column range.
For example, in the following Microsoft intermediate language (MSIL) code when you set the breakpoint on a statement that is related to a .line directive, the debugger will move to the second line.
.line 5.line 6: 8, 14
Note If both .line directives have no column range, the debugger will behave as expected and will stop on the first line.

This problem typically occurs when a compiler creates MSIL code. Then, when you debug the code in a managed code debugger such as Microsoft Visual Studio .NET, the problem occurs.

Hotfix information

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 .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.


No prerequisites are required.

Restart requirement

You do not have to restart your computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

File information

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   -----------------------------------------------------------   16-Jul-2004 23:18  1.1.4322.1063  196,608  Ilasm.exe   16-Jul-2004 00:03  1.1.4322.1044      353  Ilasm.exe.config
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
The .line directive is one of the MSIL directives for managing debugging information. For more information about the .line directive, see the product documentation that is typically located in the following folder:
C:\Program Files\Microsoft Visual Studio .NET 2003\SDK\v1.1\Tool Developers Guide\docs
For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates
IL assembly

Article ID: 889188 - Last Review: 10/07/2005 20:48:04 - Revision: 1.4

  • Microsoft .NET Framework 1.1
  • kbcompiler kbqfe kbnetframe110presp2fix kbfix kbbug kbprb KB889188