Error during SendHTTPost action in Sample Webhooks process

I’m receiving the following error on the 2nd action of the “SENDHTTPPOST Workflow Application” demo application that i downloaded from the github link (

CODE: ErrorWebServiceCall (#217)
SOURCE: WebServiceExecute
MESSAGE: Error while invoking the web method Send : Exception has been thrown by the target of an invocation. : System.Web.Services.Protocols.SoapException: ‘Advantys.Workflow.Applications.SendHttpPost.SendHttpPost’ does not contain a definition for 'CreateDictionaryFromStringKeys’
at Advantys.Workflow.Applications.SendHttpPost.SendHttpPost.Send(String WFGEN_CONTEXT)

I believe i performed all the requirements correctly and followed the instructions. Can you please provide me some direction as to what this error means?


I re-tested both .NET examples using JSON and URLENCODED content types in my WorkflowGen v7.1.1 and got no error; the application works as expected.
I suggest you to post a ticket to our support team specifying your versions of WorkflowGen and WorkflowGen.My library, and we’ll try to resolve your issue.