Process chain problem: Step completion not occuring

Greetings!

My problem involves a datastore activation step in a process chain. The step will start and the datastore is activated successfully - all lights are green in the process monitor. However, that step in the process chain remains yellow. It's as though the notification is not 'getting back' to the chain that the step was completed successfully.

I've searched through various logs (SLG1), looked at the batch jobs in SM37, etc, and I've found no sign of any failed processes. Is there anywhere else I can look?

I'm on SAP EHP 1 for SAP NetWeaver 7.0. Oracle DB, release 11.2.0.2.0.

Thank you!