405 Method Not Allowed when trying HTTP method POST in SAP Gateway Client

[YS1990]

Hi,

I'm trying to make a sample of POST data in SEGW that call a BAPI. I follow this tutorial step by step:

Step-by-step Creation of sales order using BAPI in... - SAP Community

However, when I try to POST through SAP Gateway Client, there is error 405 Method Not Allowed. I already tried some solutions including tick Creatable, Updatable in Entity Properties but the error 405 persists.
I also try to create another SEGW project that call a simple BAPI to insert data to my ZTable, but
The similar error 405 also happens

HTTP Status Code : 405
Error Text : The specified HTTP method is not allowed for the resource identified by the Data Service Request URI
T100 Error ID : /IWFND/CM_CONSUMER122

I also make other SEGW sample project to GET data from a BAPI as well, it works well and everything is okay. The problem only happens when I POST data to a BAPI create.
Is there any solution for this error? Is is related to networking setting/configuration?

[junwu]

show us your post call payload

[junwu]

and url for the post call

[YS1990]

Thanks I have posted the screnshot and the HTTP request body

[YS1990]

The Data Services Request contains SystemQueryOptions that are not allowed for this Request Type

[YS1990]

{
  "d" : {
    "__metadata" : {
      "id" : "http://hostname.local:8004/sap/opu/odata/sap/Z_ODTSLSORDCRT_SRV/SalesOrderSet('50000004')",
      "uri" : "http://hostname.local:8004/sap/opu/odata/sap/Z_ODTSLSORDCRT_SRV/SalesOrderSet('50000004')",
      "type" : "Z_ODTSLSORDCRT_SRV.SalesOrder"
    },
    "DocType" : "TA",
    "SalesOrg" : "8900",
    "DistrChan" : "10",
    "Division" : "11",
    "TextLine" : "coba text",
    "ItmNumber" : "000010",
    "ReqQty" : "15.000",
    "PartnRole" : "AG",
    "PartnNumb" : "0001000000",
    "Material" : "000000000030000032",
    "Plant" : "8921",
    "TargetQty" : "15.000",
    "CondType" : "",
    "CondValue" : "0.000000000"
  }
}

[kyo_choi2]

Can you debug at the implement code?

[YS1990]

Nah, I try to put a breakpoint but when I call the POST, it didn't debug. When I use /h, it only debug PAI method on Gateway UI