Program: 72534
Project: 72534
Buggy source:
/** 
 * Initialize command, arguments and environment variables to invoke the subprocess.
 * @param directory The current path where the simulation is executed.
 * @exception IllegalActionException If the directory to launch theRTIG process doesn't exit.
 */
public void initialize(String directory) throws IllegalActionException {
  _directoryAsFile=null;
  _isAlreadyLaunched=false;
  _runtime=Runtime.getRuntime();
  String certiHome=null;
  if (System.getenv("String_Node_Str") != null) {
    certiHome=System.getenv("String_Node_Str");
  }
 else   if (_hlaManager.getContainer().getAttribute("String_Node_Str") != null) {
    certiHome=((StringToken)((Parameter)_hlaManager.getContainer().getAttribute("String_Node_Str")).getToken()).stringValue();
  }
 else   if (_hlaManager.getAttribute("String_Node_Str") != null) {
    certiHome=((StringToken)((Parameter)_hlaManager.getAttribute("String_Node_Str")).getToken()).stringValue();
  }
 else {
    throw new IllegalActionException(_hlaManager,"String_Node_Str");
  }
  if (_debugging) {
    _debug("String_Node_Str" + certiHome);
  }
  File fedFileName=new File(directory);
  List<String> commandList=new LinkedList<String>();
  commandList=_getCommandList();
  commandList.add(certiHome + "String_Node_Str");
  commandList.add(fedFileName.getName());
  _commandArray=commandList.toArray(new String[commandList.size()]);
  String pathSeparator=System.getProperty("String_Node_Str");
  _environmentArray=new String[1];
  String osName=StringUtilities.getProperty("String_Node_Str");
  System.out.println("String_Node_Str" + osName);
  if (osName.startsWith("String_Node_Str")) {
    String dyldLibraryPath="String_Node_Str" + certiHome + "String_Node_Str";
    String dyldVariable=System.getenv("String_Node_Str");
    if (dyldVariable != null) {
      dyldLibraryPath+=pathSeparator + dyldVariable;
    }
    _environmentArray[0]=dyldLibraryPath;
  }
 else   if (osName.startsWith("String_Node_Str")) {
    String path="String_Node_Str" + certiHome + "String_Node_Str";
    String pathVariable=System.getenv("String_Node_Str");
    if (pathVariable != null) {
      path+=pathSeparator + pathVariable;
    }
    _environmentArray[0]=path;
  }
 else {
    String ldLibraryPath="String_Node_Str" + certiHome + "String_Node_Str";
    String ldVariable=System.getenv("String_Node_Str");
    if (ldVariable != null) {
      ldLibraryPath+=pathSeparator + ldVariable;
    }
    _environmentArray[0]=ldLibraryPath;
  }
  _directoryAsFile=new File(fedFileName.getParent());
  if (!_directoryAsFile.isDirectory()) {
    throw new IllegalActionException(_hlaManager,"String_Node_Str" + _directoryAsFile);
  }
}

Fixed version (ground truth):
/** 
 * Initialize command, arguments and environment variables to invoke the subprocess.
 * @param directory The current path where the simulation is executed.
 * @exception IllegalActionException If the directory to launch theRTIG process doesn't exit.
 */
public void initialize(String directory) throws IllegalActionException {
  _directoryAsFile=null;
  _isAlreadyLaunched=false;
  _runtime=Runtime.getRuntime();
  String certiHome=null;
  if (System.getenv("String_Node_Str") != null) {
    certiHome=System.getenv("String_Node_Str");
  }
 else   if (_hlaManager.getContainer().getAttribute("String_Node_Str") != null) {
    certiHome=((StringToken)((Parameter)_hlaManager.getContainer().getAttribute("String_Node_Str")).getToken()).stringValue();
  }
 else   if (_hlaManager.getAttribute("String_Node_Str") != null) {
    certiHome=((StringToken)((Parameter)_hlaManager.getAttribute("String_Node_Str")).getToken()).stringValue();
  }
 else {
    throw new IllegalActionException(_hlaManager,"String_Node_Str");
  }
  if (_debugging) {
    _debug("String_Node_Str" + certiHome);
  }
  File fedFileName=new File(directory);
  List<String> commandList=null;
  commandList=_getCommandList();
  commandList.add(certiHome + "String_Node_Str");
  commandList.add(fedFileName.getName());
  _commandArray=commandList.toArray(new String[commandList.size()]);
  String pathSeparator=System.getProperty("String_Node_Str");
  _environmentArray=new String[1];
  String osName=StringUtilities.getProperty("String_Node_Str");
  System.out.println("String_Node_Str" + osName);
  if (osName.startsWith("String_Node_Str")) {
    String dyldLibraryPath="String_Node_Str" + certiHome + "String_Node_Str";
    String dyldVariable=System.getenv("String_Node_Str");
    if (dyldVariable != null) {
      dyldLibraryPath+=pathSeparator + dyldVariable;
    }
    _environmentArray[0]=dyldLibraryPath;
  }
 else   if (osName.startsWith("String_Node_Str")) {
    String path="String_Node_Str" + certiHome + "String_Node_Str";
    String pathVariable=System.getenv("String_Node_Str");
    if (pathVariable != null) {
      path+=pathSeparator + pathVariable;
    }
    _environmentArray[0]=path;
  }
 else {
    String ldLibraryPath="String_Node_Str" + certiHome + "String_Node_Str";
    String ldVariable=System.getenv("String_Node_Str");
    if (ldVariable != null) {
      ldLibraryPath+=pathSeparator + ldVariable;
    }
    _environmentArray[0]=ldLibraryPath;
  }
  _directoryAsFile=new File(fedFileName.getParent());
  if (!_directoryAsFile.isDirectory()) {
    throw new IllegalActionException(_hlaManager,"String_Node_Str" + _directoryAsFile);
  }
}