Illegal State Exception: Couldn't read row 0, col 1

This is probably such a simple fix, and I just can't see it.

I have a class which is used to create an entry into the sqlite table TRANSACTIONS. Part of this transaction creation includes inserting the borrower's name. To do this, I have a method which should get the user's name, by passing the user's B-Number as a parameter.

However, when I try to create the transaction, the app crashes and I am presented with the error

  java.lang.IllegalStateException: Couldn't read row 0, col 1 from CursorWindow.  Make sure the Cursor is initialized correctly before accessing data from it.
        at android.database.CursorWindow.nativeGetString(Native Method)
        at android.database.CursorWindow.getString(CursorWindow.java:438)
        at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:51)
        at example.anna.com.pi_prototype_30.UsersDAO.cursorToUsers(UsersDAO.java:124)
        at example.anna.com.pi_prototype_30.UsersDAO.getUserName(UsersDAO.java:110)
        at example.anna.com.pi_prototype_30.BorrowScan$1.onClick(BorrowScan.java:118)

CursorToUsers method:

private Users cursorToUsers(Cursor cursor){
    Users user = new Users();

    user.setTableID(cursor.getLong(0));
    user.setuType(cursor.getString(1));
    user.setIdNum(cursor.getString(2));
    user.setName(cursor.getString(3));
    user.setEmail(cursor.getString(4));
    user.setCourse(cursor.getString(5));
    user.setPassword(cursor.getString(6));

    return user;
}

getUserName Method

public Users getUserName(String m) {

    Cursor c = aDatabase.rawQuery("SELECT 1 FROM  users WHERE id_number = ?", new String[]{m});

    c.moveToFirst();
    Users nameL;
   if (c.moveToFirst()){

    do {
            nameL = cursorToUsers(c);
        }while (c.moveToNext());
    }
    else{
        return null;
    }
    c.close();
    return nameL;
}

CreateLoan method

public void addListenerOnCreateLoanButton(){
    final Context context = this;

    saveButton = (Button) findViewById(R.id.borrow_scan_create_loan);

    saveButton.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            Boolean didi = true;

            //Initialises today's date
            Calendar c = Calendar.getInstance();
            SimpleDateFormat df = new SimpleDateFormat("dd-MMM-yyyy");

            //Initialise loan variables
            String bNum = cardContentTxt.getText().toString();
            String kNum = contentTxt.getText().toString();
            String bDate = df.format(c.getTime());
            String rDate = "N/A";
            String type = "Loan";
            String bName = (usersDAO.getUserName(bNum)).toString();
            try {

                transDAO.open();
                transDAO.createTransactionEntry(type, bDate, rDate, bNum, bName, kNum);
                transDAO.close();

            }//try

            catch (Exception e) {
                didi = false;
                Log.d(TAG, "Error");
                e.printStackTrace();
            }//catch
            finally {
                if (didi) {
                    Dialog d = new Dialog(BorrowScan.this);
                    d.setTitle("Database write");
                    TextView tv = new TextView(BorrowScan.this);
                    tv.setText("it  worked ");
                    Log.d(TAG, "Created loan");
                    d.setContentView(tv);
                    d.show();
                }//if
            }//finally
        }//onClick
    });//onClickListener
}//createLoan

The lines being flagged as causing the error are:

Line 124:

user.setuType(cursor.getString(1));

Line 110:

nameL = cursorToUsers(c);

Line 118:

String bName = (usersDAO.getUserName(bNum)).toString();

While I'm sure there is plenty I have done wrong, what is it that is causing this specific error?

Thanks for any help.