> Please note that the these errors are very variant. Sometimes they
> don't occur. Sometimes they do.
>
> Does anyone have a clue regarding what could be wrong?
Your network.
Timeouts?
Traceroute between your various hosts.
Check that there are no distant users, who could
create locks in serialization, for the time of long
round-trips: ct lsclient, and again traceroute.
But you should have clues in the logs.
Marc