Program: 72799
Project: 72799
Buggy source:
/** 
 * load the Modelica file and library.
 * @param fileName File that the (base-)model should be loaded from.
 * @param modelName Name of the (base-)model that should be built.
 * @exception ConnectException If commands couldn'tbe sent to the (OpenModelic Compiler)OMC.
 * @exception FileNotFoundException If no file found at the selective path for loading.
 */
public void loadModelicaFile(String fileName,String modelName) throws ConnectException {
  String loggerInfo=null;
  _filePath=_systemPath + "String_Node_Str" + fileName;
  File file=new File(_filePath.toString());
  if (file.exists()) {
    loggerInfo=fileName + "String_Node_Str" + _filePath;
    _omcLogger.getInfo(loggerInfo);
    CompilerResult loadFileInteractiveQualifiedResult=sendCommand("String_Node_Str" + _filePath + "String_Node_Str");
    if (!loadFileInteractiveQualifiedResult.getFirstResult().isEmpty() && loadFileInteractiveQualifiedResult.getError().isEmpty()) {
      loggerInfo=modelName + "String_Node_Str" + _filePath+ "String_Node_Str";
      _omcLogger.getInfo(loggerInfo);
    }
 else     if (!loadFileInteractiveQualifiedResult.getError().isEmpty()) {
      loggerInfo=loadFileInteractiveQualifiedResult.getError();
      _omcLogger.getInfo(loggerInfo);
      throw new ConnectException(loggerInfo);
    }
    CompilerResult loadModelResult=sendCommand("String_Node_Str");
    if (loadModelResult.getFirstResult().compareTo("String_Node_Str") == 0) {
      loggerInfo="String_Node_Str";
      _omcLogger.getInfo(loggerInfo);
    }
 else     if (!loadModelResult.getError().isEmpty()) {
      loggerInfo=loadModelResult.getError();
      _omcLogger.getInfo(loggerInfo);
      throw new ConnectException(loggerInfo);
    }
  }
 else {
    throw new ConnectException("String_Node_Str" + _filePath);
  }
}

Fixed version (ground truth):
/** 
 * load the Modelica file and library.
 * @param fileName File that the (base-)model should be loaded from.
 * @param modelName Name of the (base-)model that should be built.
 * @exception ConnectException If commands couldn'tbe sent to the (OpenModelic Compiler)OMC.
 * @exception FileNotFoundException If no file found at the selective path for loading.
 */
public void loadModelicaFile(String fileName,String modelName) throws ConnectException {
  String loggerInfo=null;
  _filePath=_ptIISystemPath + "String_Node_Str" + fileName;
  File file=new File(_filePath.toString());
  if (file.exists()) {
    loggerInfo=fileName + "String_Node_Str" + _filePath;
    _omcLogger.getInfo(loggerInfo);
    CompilerResult loadFileInteractiveQualifiedResult=sendCommand("String_Node_Str" + _filePath + "String_Node_Str");
    if (!loadFileInteractiveQualifiedResult.getFirstResult().isEmpty() && loadFileInteractiveQualifiedResult.getError().isEmpty()) {
      loggerInfo=modelName + "String_Node_Str" + _filePath+ "String_Node_Str";
      _omcLogger.getInfo(loggerInfo);
    }
 else     if (!loadFileInteractiveQualifiedResult.getError().isEmpty()) {
      loggerInfo=loadFileInteractiveQualifiedResult.getError();
      _omcLogger.getInfo(loggerInfo);
      throw new ConnectException(loggerInfo);
    }
    CompilerResult loadModelResult=sendCommand("String_Node_Str");
    if (loadModelResult.getFirstResult().compareTo("String_Node_Str") == 0) {
      loggerInfo="String_Node_Str";
      _omcLogger.getInfo(loggerInfo);
    }
 else     if (!loadModelResult.getError().isEmpty()) {
      loggerInfo=loadModelResult.getError();
      _omcLogger.getInfo(loggerInfo);
      throw new ConnectException(loggerInfo);
    }
  }
 else {
    throw new ConnectException("String_Node_Str" + _filePath);
  }
}