How to cast TableOwner in async mode?

[RLEECI]

So 2 have two models in 2 different modes: syn and asyn

 model = pfcSession.GetCurrentSession().GetCurrentModel();

  connection = pfcAsyncConnection.AsyncConnection_Connect(null, null, null, 20);
                model = connection.GetSession().GetCurrentModel();

I have checked and both models are valid and I have no issue casting the TableOwner tableowner from the two models. However, I cannot get a list of tables with async mode

TableOwner tableOwner = (TableOwner)model;
                if(tableOwner!=null)
                {
                    tableOwner.ListTables().getarraysize();
                }

tableOwner is not null but ListTables() actually returns null error. I am not sure if I do not cast it properly or I need something special to make it work.

[RLEECI · Accepted solution]

stupid me, I cannot use both jlink syn and asyn jar in the same project.