My issue is getting Unauthoraized exception while accessing external data in workflow 2013 context throw REST call (HttpSend).
I read several posts suggests to create BDC model inside App package, but it doesn't solve the problem. I created propriate model and achived possibility to view external data via web interface. (External list was created manually). But still Unauthoraized exception is there:
"Apps cannot use External Content Types defined in the Business Data Connectivity Shared Service Application metadata catalog. Apps should package any External Content Type definitions in a BDC model file which is packaged and deployed as part of the SharePoint App"
Appreciate any suggests.