I think there was a second question in there also.  You can use the % operator 
as part of a condition expression ( LaunchCondiitons or Type 19 CA ) to exit 
the install.
   
  http://msdn2.microsoft.com/en-us/library/aa368012.aspx
  

Peter Marcu <[EMAIL PROTECTED]> wrote:
                It is an environment variable. It need to be defined in your 
environment.
   
      From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Parakala, 
Padmavathi
Sent: Friday, October 05, 2007 2:04 PM
To: wix-users@lists.sourceforge.net
Subject: [WiX-users] how to exit the install if env varible is not found


   
  Hi,
    I am new to wix and I am trying to do a x86 build.
  I am setting up a varible 
  $(env._BuildArch) ="x86"
  <?define Win64 = yes ?>
  <Component Id="someComponent" DiskId="1" Guid="someGUID" 
  Win64="$(var.Win64)">
   
  I am getting an error  
   
  fatal error CNDL0023: Undefined environment variable: $(env._BuildArch).
   
  how do I define this?
   
  And other question is “how to exit the install if env varible is not found”
   
  Thank you,
  Padma.

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