Creating user defined migration objects for direct transfer

Hi All,

I am trying to create a user defined migration object for direct transfer in LTMOM transaction,but I am only getting 2 options, either to use file based transfer or staging table approach.

When I create a new migration object in the Fiori app for direct transfer, and then come back to LTMOM and open it.

Goto More-> Migration Object -> Create migration object -> User-defined -> Migrate Data Directly from sap system

Here it is asking below

In the migration object, if i give any custom/Z name it is giving error "Given object id is not valid".

Can some one please tell me how can i create custom migration objects for direct transfer using migration cockpit.