Problem in Filling the qtablewidget Using file ...help me!!:)

hi everyone,
i am new in qt and i've worked with for recently week !
i've written a txt file and wanna fill the qtablewidget from the datas on the txt file(named semester1)
this is my code , i think my alghoritm is right but ... so it doesn't work ! with a Runtime error !! could you please help me ?!
this is my code:

Code:

---

QFile smstr1("semester1.txt");
    if (!smstr1.open(QIODevice::ReadOnly|QIODevice::Text))
        return;
 
    QTextStream t1(&smstr1);
   int k=1;
   while (!t1.atEnd() && k<=(ui->tableWidget->rowCount()*ui->tableWidget->columnCount()))
    {
 
        if (k==1)
        {
        ui->tableWidget->item(0,0)->setText(t1.readLine());k++;
        }
 
        else if (k==2)
        {
            ui->tableWidget->item(1,0)->setText(t1.readLine());k++;
        }
 
        else if (k==3)
        {
            ui->tableWidget->item(2,0)->setText(t1.readLine());k++;
        }
 
        else if (k==4)
        {
            ui->tableWidget->item(3,0)->setText(t1.readLine());k++;
        }
 
        else if (k==5)
        {
            ui->tableWidget->item(4,0)->setText(t1.readLine());k++;
        }
        else if (k==6)
        {
            ui->tableWidget->item(5,0)->setText(t1.readLine());k++;
        }
       else if (k==7)
        {
            ui->tableWidget->item(0,1)->setText(t1.readLine());k++;
        }
        else if (k==8)
        {
            ui->tableWidget->item(1,1)->setText(t1.readLine());k++;
        }
        else if (k==9)
        {
            ui->tableWidget->item(2,1)->setText(t1.readLine());k++;
        }
 
        else if (k==10)
        {
            ui->tableWidget->item(3,1)->setText(t1.readLine());k++;
        }
        else if (k==11)
        {
            ui->tableWidget->item(4,1)->setText(t1.readLine());k++;
        }
        else if (k==12)
        {
            ui->tableWidget->item(5,1)->setText(t1.readLine());k++;
        }
        else if (k==13)
        {
            ui->tableWidget->item(0,2)->setText(t1.readLine());k++;
        }
        else if (k==14)
        {
            ui->tableWidget->item(1,2)->setText(t1.readLine());k++;
        }
        else if (k==15)
        {
            ui->tableWidget->item(2,2)->setText(t1.readLine());k++;
        }
        else if (k==16)
        {
            ui->tableWidget->item(3,2)->setText(t1.readLine());k++;
        }
        else if (k==17)
        {
            ui->tableWidget->item(4,2)->setText(t1.readLine());k++;
        }
        else if (k==18)
        {
            ui->tableWidget->item(5,2)->setText(t1.readLine());k++;
        }
 
 
  }

---

consider : "k" shows the line of the txt file , i mean each tablewidget has 6 rows with 3 columns ... so my file has 18 lines .
Thanx in Advance ;)

What it means "it doesn't work" and what is "Runtime error" ?

Lesiok ... thanks for your rep ;)
i mean i run the program successfully and when i push a button (to fill the table using file ) , it opens a new window and exit the Program !!

So run program under debuger and try to find the reason for this behavior. The glass ball today is not working.