Application module AppModuleImpl_1 is not root app module but has no parent

Question

Dear all
every time i am trying to run any script on appmodule level i am getting this error Application module AppModuleImpl_1 is not a root app module but has no parent
what is wrong i write every time in my code that causes this error ?
Many Thanks

Answer 1

This is the method inside the backing bean :
    public String cb2_action() {    
            DemoImpl demo = new DemoImpl();
        demo.prop(getLocid().toString(),getHoldesc().toString());
return null;
}This method "prop" is written inside the AM called "Demo" :
    public void prop(String locid, String holdesc) {
CallableStatement st = null ;
            try {
            StringBuffer str = new StringBuffer();
            str.append(" BEGIN ");
            str.append(" test_package.prop( ");
            str.append("       locid           => :1, ");
            str.append("       holdesc         => :2  ");
            str.append("    ); ");
            str.append(" END; ");
          st =getDBTransaction().createCallableStatement(str.toString(), 1);
              st.setInt(1, Integer.parseInt(locid));
            st.setString(2, holdesc);
            st.execute();
        } catch (SQLException sqle) {
            // TODO: Add catch code
            sqle.printStackTrace();
        } catch (NumberFormatException nfe) {
            // TODO: Add catch code
            nfe.printStackTrace();
        }