I learn SAP S/4HANA at cockpit.hanatrial.ondemand.com
I'd like to learn tutorial "Brand-new ABAP 7.4 for SAP HANA End to End Development Guide with Latest ABAP 7.4 SP5 Features" from https://www.sap.com/documents/2014/04/42f594e1-527c-0010-82c7-eda71af511fa.html.
I had a error "SAP GUI is not supported in project TRL_EN" when called transaction SEGW.
Where can I get a SAP system to learn Gateway (SEGW)?