Error in ReadWriteEntities.java (1st persistence example)

Hello

I have installed the last mdk plugin for eclipse (2.1.4.1). I had no problems with the 3 examples of the tutorial (mdk doc).

I'm currently trying to run the first persistence example, but just after having imported it, I got following error message:

"The method get(String, TreeOptionType)in the type TransactionManager is not applicable for the arguments (String, String) in ReadWriteEntities.java". Strange.

I looked in the javadoc where the method get(String, String) apparently exists whereas in the class com.sap.ip.me.api.persist.core.TransactionManager it doesn't.

Could anyone help me please ?