title: WIX Custom Actions sequence
body: <p>I have defined a few Custom Actions in my WIX setup, and these actions call third party EXE's that our application depends on. The user decides to install or ignore these 3rd party applications from the feature tree. My CustomAction and binary tags look like this:</p>
  
  <pre><code>&lt;CustomAction Id='NL220_Action' BinaryKey='NL220EXE' Return='asyncWait'  /&gt;
  &lt;Binary Id="NICEXE" SourceFile="..\NL220.exe" /&gt;
  
  &lt;CustomAction Id='NIC_Action' BinaryKey='NICEXE' Return='asyncWait'  /&gt;
  &lt;Binary Id="NICEXE" SourceFile="..\NIC.exe" /&gt;
  </code></pre>
  
  <p>Furthermore, my InstallExecuteSequence tag looks like this:</p>
  
  <pre><code>&lt;InstallExecuteSequence&gt;
      &lt;Custom Action="NL220_Action" After="InstallFinalize"&gt;&lt;![CDATA[(&amp;Optional_NL220=3)]]&gt;&lt;/Custom&gt;
      &lt;Custom Action="NIC_Action" After="NL220_Action"&gt;&lt;![CDATA[(&amp;Optional_NIC=3)]]&gt;&lt;/Custom&gt;
  &lt;/InstallExecuteSequence&gt;
  </code></pre>
  
  <p>Everything works fine: the user can select which 3rd party installer packages to run, and these are then run when the installer finishes. The problem is that if the user selects both 3rd party installers, they are run at the same time, thus ignoring the <strong>After="NL220_Action"</strong> attribute of the second custom action. Any ideas why this is?</p>