General Error- What does that mean?

Hi, when trying to run my entity class, this "General error" occur and i do not really know what does that mean and how can i solve it.
Here is the code where the error lies:

Code:

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        public boolean createGameQuestion() {
                boolean success = false;
                ResultSet rs = null;
                DBController db = new DBController();
                String dbQuery;
                db.setUp("CFDatabase");
               
                if ( g_question == " ") {
                        dbQuery = "INSERT INTO GameQuestion (g_image1,";
                        dbQuery = dbQuery + "g_image2, g_image3, g_imageDescription1, g_imageDescription2, g_imageDescription3)";
                        dbQuery = dbQuery + "VALUES(\'" + g_image1 + "','" + g_image2 + "', '" + g_image3 + "', '";
                        dbQuery = dbQuery + g_imageDescription1 + "', '" + g_imageDescription2 + "', '" + g_imageDescription3 + "')";
                }
                else {
                        dbQuery = "INSERT INTO GameQuestion (g_question, g_image1,";
                        dbQuery = dbQuery + "g_image2, g_image3, g_imageDescription1, g_imageDescription2, g_imageDescription3)";
                        dbQuery = dbQuery + "VALUES (\'" + g_question + "', '";
                        dbQuery = dbQuery + g_image1 + "', '" + g_image2 + "', '" + g_image3 + "', '";
                        dbQuery = dbQuery + g_imageDescription1 + "', '" + g_imageDescription2 + "', '" + g_imageDescription3 + "')";
                       
                }
                rs = db.updateRequestKey(dbQuery);
                try{
                            if (rs.next()){
                                // this will return the ID which is a auto number primary key
                                g_question = rs.getString(1);
                                success = true;   
                            }
                        }
                        catch (Exception e) {
                          e.printStackTrace();
                        }
                        db.terminate();
                        return success;
                }

---

And here is what the console say about the error:
connection is jdbc:odbc:CFDatabase
DB Query: INSERT INTO GameQuestion (g_question, g_image1,g_image2, g_image3, g_imageDescription1, g_imageDescription2, g_imageDescription3)VALUES ('null', '/HealthOK/ui/images/wine1.png', '/HealthOK/ui/images/wine2.png', '/HealthOK/ui/images/wine3.png', '1 large wine (250ml)', '1 bottle of wine', '1 bottle of whisky')
java.sql.SQLException: General error
at sun.jdbc.odbc.JdbcOdbc.createSQLException(Unknown Source)
at sun.jdbc.odbc.JdbcOdbc.standardError(Unknown Source)
at sun.jdbc.odbc.JdbcOdbc.SQLExecDirect(Unknown Source)
at sun.jdbc.odbc.JdbcOdbcStatement.execute(Unknown Source)
at sun.jdbc.odbc.JdbcOdbcStatement.executeUpdate(Unkn own Source)
at OOPJ.database.DBController.updateRequestKey(DBCont roller.java:84)
at HealthOK.entity.gameQuestion.createGameQuestion(ga meQuestion.java:183)
at HealthOK.entity.gameQuestion.main(gameQuestion.jav a:22)
java.lang.NullPointerException
at HealthOK.entity.gameQuestion.createGameQuestion(ga meQuestion.java:185)
at HealthOK.entity.gameQuestion.main(gameQuestion.jav a:22)

Quote:

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java.lang.NullPointerException
at HealthOK.entity.gameQuestion.createGameQuestion(ga meQuestion.java:185)

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The trace stack shows you have a null variable being used at line 185. Look at that line and see what variable is null.