Collection may have been accessed after transaction exception ?

Question

I am using Forte for Java EE to create 2 CMP Entity
Beans : Employee and Paycheck. I access the Employee
Entity bean from servlet and then look up the associated Paycheck objects as shown below:
InitialContext initial = new InitialContext();
Object objref =
initial.lookup("java:comp/env/ejb/employee");
EmployeeLocalHome ref = (EmployeeLocalHome) objref;
if ( ref == null)
System.err.println("EmployeeLocalHome not found !");
EmployeeLocal emp = ref.findByPrimaryKey(new Integer(empid));
if ( emp == null)
System.err.println("Find failed..EmployeeLocal not found ! ");
Iterator paychecks = emp.getPaycheck().iterator()
At this point I get the exception:
java.lang.IllegalStateException: Collection may have been accessed after transaction completion.
at com.sun.ejb.persistence.PMSet.iterator(PMSet.java:72)
at payroll.paycheck.LoginViewBean.handleSubmitRequest(LoginViewBean.java:218)
Any pointers on where i am going wrong ?

Answer 1

I have figured out what the problem is.  I was running an old version of SAP GUI.  Creating the GP with SAP Transaction defaults to GuiType=WinGui instead of WebGui.