I'm going through the foundation tutorial (building the HomeConnectionMashup). I'm on the step Simulate Data Source/Explore the imported entities step (creating 30 second timer subscription). When I try to Save, I'm getting the following error...
The closest I see to the error you're receiving is in this other post:
It looks like checking the Foundation_Tutorial_Services.xml from the tutorial for errors/typos (and posting it here so we can look it over) could be useful.
-- Craig A.
Retrieving data ...