Thanks, Igor.
 
I finally fixed it. The issue is mentioned in the following link:
http://www.blinnov.com/2010/06/04/microsoft-was-unexpected-at-this-time/en/
 
In my case, the offender is that the value of my "System Variable->%PATH%" was set to:
"C:\Program Files\Microsoft DirectX SDK (October 2006)\Utilities\Bin\x86"; (other paths omitted)
 
I remove its openning and closing quotes, like so:
C:\Program Files\Microsoft DirectX SDK (October 2006)\Utilities\Bin\x86; (other paths omitted)
 
To share my experience, here is how I sucessfully build everything in boost 1_50_0 on Windows XP for MSVC2008:
(0) download "boost_1_50_0.zip" from
http://sourceforge.net/projects/boost/files/boost/1.50.0/
and unzip it to (your preferred directory, in my case):
C:\boost_1_50_0
 
(1) Launch Visual Studio 2008 Prompt Console Windows from:
Start->All Programs->Microsoft Visual Studio 2008->Visual Studio Tools->Visual Studion Command Prompt
 
(2) cd C:\boost_1_50_0
 
(3) bootstrap.bat
This automatically generated b2.exe under C:\boost_1_50_0 directory
 
(4) .\b2 
 
I got the following, NICE reminding prompts at its end [of step (4) ]:
The Boost C++ Libraries were successfully built!
The following directory should be added to compiler include paths:
    C:/boost_1_50_0
The following directory should be added to linker library paths:
    C:\boost_1_50_0\stage\lib
 
The building process is suprisingly simple and user-friendly.
 
Thanks a lot for Boost library developers.
 
Robert

 
On Wed, Jul 18, 2012 at 5:37 PM, Igor R <boost.lists@gmail.com> wrote:
> I resolved the issue and tried everthing suggested.
>
> Here is the complete ouput error I got after runing bootstrap.bat or
> \v2\engine\build.bat:
> C:\boost_1_50_0\tools\build\v2\engine>build.bat
> \Utilities\Bin\x86";c:\python23\.;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\syst
> em32\wbem;c:\program files\ati technologies\ati.ace\;c:\program
> files\microsoft
> sql server\80\tools\binn\;c:\program files\cvsnt;c:\Program Files\Microsoft
> SQL
> Server\90\Tools\binn\;C:\Program Files\TortoiseSVN\bin;C:\Program
> Files\MySQL\My
> SQL Server 5.0\bin;C:\Program Files\Microsoft Visual Studio
> 9.0\VC\bin;C:\WINDOW
> S\Microsoft.NET\Framework\v3.5\;C:\Program Files\Microsoft Visual Studio
> 2008 SD
> K\VisualStudioIntegration\Tools\Sandcastle\ProductionTools\" was unexpected
> at this time.
>
> Any idea?


It seems that you fixed it incorrectly.
Ensure that PATH variable is correct.
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