title: "Package should contain a content type part [M1.13]"
body: <p>I am attempting to write to an Excel file however I keep getting the error:</p>
  
  <blockquote>
    <p>Exception in thread "main" org.apache.poi.POIXMLException: org.apache.poi.openxml4j.exceptions.InvalidFormatException: Package should contain a content type part [M1.13]</p>
  </blockquote>
  
  <p>From what I understand I am missing a jar file.  </p>
  
  <p>Can anyone help me identify which file it is?  </p>
  
  <p>P.S. I am using Netbeans.</p>
  
  <p><a href="https://i.stack.imgur.com/ETMrZ.png" rel="noreferrer"><img src="https://i.stack.imgur.com/ETMrZ.png" alt="my current files"></a></p>
  
  <pre><code>import java.io.FileInputStream;
  import java.io.FileNotFoundException;
  import java.io.FileOutputStream;
  import java.io.IOException;
  import javax.swing.JOptionPane;
  import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
  import org.apache.poi.xssf.usermodel.XSSFCell;
  import org.apache.poi.xssf.usermodel.XSSFRow;
  import org.apache.poi.xssf.usermodel.XSSFSheet;
  import org.apache.poi.xssf.usermodel.XSSFWorkbook;
  
  /**
   *
   * @author nicholaskissaun
   */
  
  public class Tester {
  
      public static void main (String args \[\])throws FileNotFoundException, IOException, InvalidFormatException{     
          int RowCount = 7, iChoice;
          String sChoice;
          XSSFSheet s;
          XSSFRow row1;
          XSSFWorkbook wb;
          XSSFCell r1c1, r1c2, r1c8, r1Episodes;
  
          FileInputStream fis = new FileInputStream("/Users/nicholaskissaun/Google Drive/Grade 11_12/Computer Science/Java/Term1/src/IA/Profiles/Becky/ShowDetails.xlsx");           
          wb = new XSSFWorkbook(fis);  
          s = wb.getSheetAt(0);
  
      }      
  
  }
  </code></pre>