Have seen similar issue in 8.0 SP1,2
As you said , that was supposed to be fixed in later SP levels.
By any means this is not the advanced repeater right ?
What do you get in the rscd.log of the repeater ?
Do you have any other complexties like a SOCKS proxy or so ?
There is no other complexity in this environment and this is a default REPEATER, so nothing else then an RSCD agent.
We switched any component to debug (app-server, Repeater-rscd, target-rscd) but nothing appart from "UNKNOWN ERROR" appeared in there.
can you attach the full job run log, the rscd log from the repeater and the appserver log?
we may have figured out what was causing the issue.
The repeater was still runing RSCD 8.1 SP2, while the App-Server and the target were on 8.2 already.
After we updated the agent on the Repeater, the UNKNOWN ERROR dissappered and we were not able to reproduce it yet.
We still don't know if the problem described for 8.0 SP10 also affected the 8.1 SP2 agent, and if it was fixed, but currently it looks like everything is working with 8.2 as expected.