Invalid Handle Exception-What is the reason?

Question

I face with "Invalid Handle exception" (SQLException) while using the following code.
Could anybody tell me the possible reasons/Situation the error rise?
stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery(SQLStmt);
     if(rs!=null){
ResultSetMetaData rsm = rs.getMetaData();
     int totalcols = rsm.getColumnCount();
     Vector temp;
     while (rs.next()) {
     Vector temp = new Vector();
     for (int i = 1; i <= totalcols; i++) {
          String value = rs.getString(i);
          if (value == null) {
          value = "";
     temp.addElement(value);
     }//for loop ends here
     valueVector.addElement(temp);
     rs.close();
     stmt.close();     
Thank you all

Answer 1

Vector temp;
while (rs.next()) {
Vector temp = new Vector();Are you sure that this is the code you are running? The reason I ask is that I'm pretty sure that it won't compile, at least under JDK1.4. You should get a compile error something like "temp is already defined".
If thats not the problem you need to find out on which line the error actually occurs. You can get this from the exception by calling the printStackTrace() method.
Col