I am trying to use the above for a inbound scenario, where my custom idoc will be posted with calling the underlying custom BAPI to create shipments.
i followed the steps as in (https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/2a1dd5d3-0801-0010-ed8d-bd797ed922cb) everything went well under 'Inbound tasks' until tcode BDBG, where in i got error 'idoc does not exist', so i created my custom idoc ZTPSSHT01 from scratch. now in BDBG after prompting for request#, i get error "ZE1TPSHH has not been generated, further processing not possible ".
ZE1TPSHH is my header segment in the z-idoc. i have released all the segments and the idoc.