How can create root note EHHSS_INCIDENT in GBI

Dear All Experts,

I have big issue that make me crazy. Please take some time to help me

I am creating a service using Gateway Service Builder for GBI.

I redefine a BOPF : EHHSS_INCIDENT.

I want to create a SERVICE in order to create a report incident simplified.

when I redefine EHHSS_INCIDENT, I see that the system generate a model and service  and save on   /BOFU/GBI_CUST table ,( example : ZINCIDENT_MDL, ZINCIDENT_SRV)

after that, I generated as normal , I see that the system will generate other model and service( example : ZINCIDENT1_MDL, ZINCIDENT1_SRV), and they don't save in  /BOFU/GBI_CUST.

So when I registry ZINCIDENT1_SRV then I can not debug in any method I redefined( in my code below is CREATE ENTITY and GET ENTITY)

because I see this code :

SELECT SINGLE * FROM /bofu/gbi_cust INTO ls_gbi_cust WHERE service_name = mv_service_name ##WARN_OK.

if I run URI with service is ok ( in my case : ZINCIDENT_SRV), Howerver, If I create one more entity by my hand , then I can not run URI  this entity set with ZINCIDENT_SRV

for get entity,

/sap/opu/odata/sap/ZINICIDENT1_SRV/INCIDENTSet   ----> it's ok

/sap/opu/odata/sap/ZINICIDENT_SRV/INCIDENTSet  -----> I have error code : 400 : Resource not found for the segment 'INCIDENTSet'.

what service I have to use at here?

I also created  some method.

and here is code for CREATE_ROOT_NODE

parameter : IO_INC_ROOT_NODE ref to CL_EHFND_END_NODE

IV_CATELOGY  TYPE EHHSS_INC_CATEGORY_CODE

##############

DATA: lr_s_inc_root TYPE REF TO ehhsss_inc_root.

    DATA: lo_service_manager  TYPE REF TO cl_ehfnd_ena_service_mngr.

*     Get the ROOT Node

   "   io_inc_root_node = lo_service_manager->get_root( ).



     CREATE DATA lr_s_inc_root.

      "Create an empty row

      lr_s_inc_root ?= io_inc_root_node->create_empty_row( ).

      lr_s_inc_root->category = iv_category.

      lr_s_inc_root->status = if_ehhss_inc_impl_c=>sc_inc_status-new.

      "Insert the row

      io_inc_root_node->insert_and_focus( lr_s_inc_root ).

      io_inc_root_node->get_row( 1 ).

#######################3

But I can not run this method, I debug and see that when run to

      lr_s_inc_root ?= io_inc_root_node->create_empty_row( ).

then the sytem get error and go to exception by go to this class:/IWCOR/IF_REST_HANDLER~HANDLE (/IWCOR/CL_DS_HDLR_ROOT).

My purpose is create a service that create a report incident simplified in EHSM.

Please tell me How can I create it or How can I create ROOT_NODE  and SUB NODE in this service?

Thanks in advance

Chinh Pham