title: NetBeans Cant find rt.jar when building
body: <p>I have a simple Java project in NetBeans7.2, and when I try to Clean/Build it fails:</p>
  
  <pre><code>Building jar: D:\MEUS PROJETOS\_Workspace\JavaWorkspace\Mina\dist\Mina.jar
  To run this application from the command line without Ant, try:
  java -jar "D:\MEUS PROJETOS\_Workspace\JavaWorkspace\Mina\dist\Mina.jar"
  Realizando o ofuscamento do código
  Obfuscating dist/Mina.jar...
  Created dir: D:\MEUS PROJETOS\_Workspace\JavaWorkspace\Mina\build\obfuscated
  ProGuard, version 4.8
  Reading program jar [D:\MEUS PROJETOS\_Workspace\JavaWorkspace\Mina\dist\Mina.jar]
  Reading library jar [C:\Program Files\Java\jdk1.7.0\jre\lib\ext\jna.jar]
  Reading library jar [C:\Program Files\Java\jdk1.7.0\jre\lib\ext\mysql-connector-java-5.1.21-bin.jar]
  Reading library jar [C:\Program Files\Java\jre7\lib\rt.jar]
  Reading library jar [C:\Library\Java\Home\lib\rt.jar]
  D:\MEUS PROJETOS\_Workspace\JavaWorkspace\Mina\build.xml:28: Can't read [C:\Library\Java\Home\lib\rt.jar] (No such file or directory)
  BUILD FAILED (total time: 5 seconds)
  </code></pre>
  
  <p>It's odd because I <strong>don't</strong> have that [C:\Library\Java\Home\lib\rt.jar] called in my project's library (there is no "C:\Library" in my computer at all)!</p>
  
  <p>Also, why "rt.jar" is called again, if it's already called from "C:\Program Files\Java\jre7\lib\rt.jar"?</p>
  
  <p>I have absolutely no idea where this came from, nor where I can change it (because it is not in my project's library list).</p>
  
  <p>Thanks in advance! Forgive my bad english...</p>
  
  <p>EDITED:
  I just figured out that this issue doesn't happen when the application is compiled (build), but when NetBeans' ProGuard4.8 plugin try to Obfuscate!</p>