iBatis getTransaction error

[loester]

When executing the following code using MySql as a backend...


                Reader reader=
                          Resources.getResourceAsReader("DAOMap.xml");
                        DaoManager daoManager =
                          DaoManagerBuilder.buildDaoManager(reader);
                
                        EmpDAO empDAO = new EmpDAOImpl(daoManager);
                        empDAO.deleteByPrimaryKey(Integer.valueOf(9000));


The following exception is thrown:


Exception in thread "main" java.lang.NullPointerException
        at
com.ibatis.dao.engine.impl.StandardDaoManager.getTransaction(StandardDaoManager.java:108)
        at
com.ibatis.dao.client.template.SqlMapDaoTemplate.getSqlMapExecutor(SqlMapDaoTemplate.java:61)
        at
com.ibatis.dao.client.template.SqlMapDaoTemplate.delete(SqlMapDaoTemplate.java:185)
        at dao.EmpDAOImpl.deleteByPrimaryKey(EmpDAOImpl.java:113)
        at test.Test.main(Test.java:27)

Any idea on what may be the cause?
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