Hi Praksash,

Thank you for your advice!
I am Tomohiro and Tashiro-san is my colleague.

I can successfully call a WorkFlow via Web Service.

My workflow does not have input parameter.

So my request is as follows:

==
POST /services/EngagementDesigner/wf/Admin/createInstance HTTP/1.1
Host: xxx.avaya.com
Content-Type: application/json
Cache-Control: no-cache

{ customer:"customer", imessage: "{}", iprocess:"MakeCall", workflowversion:"1" }
==

If you know any documentation describing above, please let me know.

Thank you,

Tomohiro