Cannot resolve relative repository. Process is not associated with a repository

Hi, Im new in using RM integrating to java.
My java app got this error while trying to open the process that reads my naive bayes model file:
Both my Naive bayes file and TESTING_NB.rmp is both in the Local Directory.

Error prompt:
com.rapidminer.operator.UserError: Cannot resolve relative repository "MODEL_NB". Process is not associated with a repository


try {
     RapidMiner.setExecutionMode(RapidMiner.ExecutionMode.COMMAND_LINE);
     RapidMiner.init();
     String path = "C:\\Users\\MC\\.RapidMiner\\repositories\\Local Repository\\TESTING_NB.rmp";
     
     
 
     Process process = new Process(new File(path));
     Operator op = process.getOperator("Read Excel");
     op.setParameter(ExcelExampleSource.PARAMETER_EXCEL_FILE, jTextField1.getText());
                            FileObject file = new SimpleFileObject(new File(path));

                            IOContainer input = new IOContainer(file);

     IOContainer ioResult = process.run();

    ...................//and soo on

Your help is much appreciated.