I'm getting somewhat strange behavior this morning: nested workflows don't run.
There's no error message, but there's no execution token, no log entries, and the node in the "Parent" workflow executes instantly, leaving all the output parameters undefined. (Which results either in a later exception in the Parent workflow or a quiet assumption of success which then turns out not to be true at some future date in some other workflow).
It doesn't happen for all nested workflow nodes in all workflows, but it seems to happen for the same nested node in a given workflow consistently.
Has anyone seen this before? Any suggestions on how to debug? I've restarted the VCO service with no effect. And I can't find anything in any obvious log files that indicates a problem.
VCO 5.1.0 build 2725 Running on Windows with an Oracle DB.