I am getting the error highligthed below on a Dev VM when calling the GetFulfillmentPackingSlipPDFRequest. 

Any information where values are retrieved and set for this parameter would be appreciated.  Any documentation for this new extension would sure be nice.

Thanks,

James

System.ArgumentNullException was unhandled by user code
HResult=-2147467261
Message=Value cannot be null.
Parameter name: RTSServiceHostUrl
ParamName=RTSServiceHostUrl
Source=Microsoft.Dynamics.Commerce.Runtime.Entities
StackTrace:
at Microsoft.Dynamics.Commerce.Runtime.DataModel.TransactionServiceProfile.ValidateTransactionServiceProfile()
at Microsoft.Dynamics.Commerce.Runtime.DataModel.TransactionServiceProfile..ctor(RequestContext context)
at Microsoft.Dynamics.Commerce.Runtime.TransactionService.TransactionServiceClient..ctor(RequestContext context)
at Contoso.Commerce.Runtime.PrintPackingSlipSample.GetFulfillmentPackingSlipsService.Process(GetFulfillmentPackingSlipsPDFRequest request) in K:\RetailSDK\SampleExtensions\CommerceRuntime\Extensions.PrintPackingSlipSample\GetFulfillmentPackingSlipsService.cs:line 41
at Microsoft.Dynamics.Commerce.Runtime.SingleRequestHandler`2.Execute(Request request)
at Microsoft.Dynamics.Commerce.Runtime.CommerceRuntime.Execute[TResponse](Request request, RequestContext context, IRequestHandler handler, Boolean skipRequestTriggers)
InnerException: