Having trouble passing parameters to a Site Workflow from a List Workflow. Can someone point me to an example or an example of using a Web Service in a UDA because eventually with the authorization piece that’s where this is headed.
Also does anyone have an example of using a Secured Store String in a SharePoint 2013 Nintex workflow?
Take a look at this http://nintexdownload.com/Nsupport/tutorials/How%20to%20start%20a%20workflow%20with%20the%20Call%20Web%20Service%20action.pdf
Page 8 “Passing variable values between workflows” might give you a clue for your situation.