FIX: You may receive an "Optimization failed" error message when you build a C++ application that uses the <= logical operator in Visual Studio .NET 2003

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Article ID: 900410 - View products that this article applies to.
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SYMPTOMS

When you build a C++ application in Microsoft Visual Studio .NET 2003, you may receive the following error message:
Optimization failed.
This problem occurs if the following conditions are true:
  • In the project properties, you set the Optimization option to Maximum Speed /02.
  • You build the application in release mode.
Note You do not receive the error message when you build the application in debug mode.

CAUSE

This problem occurs if you use the "Less than or equal to" (<=) logical operator to compare two values. This logical operator is not optimized to compare two values.

RESOLUTION

A supported software update 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 software update may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Visual Studio .NET 2003 service pack that contains this software update.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the software update. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:
http://support.microsoft.com/contactus/?ws=support
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.

Prerequisites

Microsoft Visual Studio .NET 2003

Restart requirement

You do not have to restart the computer after you apply this software update.

Software update replacement information

This software update does not replace any other software updates.

File information

The English version of this software update 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
   ------------------------------------------------------
   25-May-2005  07:23  13.10.5005.0  1,867,776  C2.dll
   25-May-2005  07:08  13.10.5005.0     86,016  Cl.exe

WORKAROUND

To work around this problem, use the "Less than" (<) logical operator to compare two values. For example, do not use the following code:
for (i=1;i<=n;i++)
Instead, use the following code:
for(i=0;i<n;i++)

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

MORE INFORMATION

For more 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

Properties

Article ID: 900410 - Last Review: October 9, 2011 - Revision: 3.0
APPLIES TO
  • Microsoft Visual Studio .NET 2003 Professional Edition
  • Microsoft Visual Studio .NET 2003 Enterprise Architect
  • Microsoft Visual Studio .NET 2003 Enterprise Developer
  • Microsoft Visual Studio .NET 2003 Academic Edition
Keywords: 
kbqfe kbHotfixServer kbfix kbbug KB900410

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