I am having problems when I click on a subprocess activity in the Hub.
I can initially get it to display the linked subprocess which then disappears.
All subprocesses in the source process then do not link.
Then they generate an error.
For a subprocess to be visible to a Hub user, it needs to be published.
If you are encountering this issue, please check that the subproces model is actually published.
Please note that Hub users, typically have been granted the H (Hub) Access Right, that only allows them to see published models.
KBA , BPI-SIG-HUB , SAP Signavio Process Collaboration Hub , How To