Further to my above message about "Cannot update eDirectory for this
pool", i tried under nssmu on OES/Linux instead of iManager and got the
above message.

I found this TID which seems to describe the same problem on NetWare:

The prescribed steps didn't work to solve the problem on Linux. The
only objects i could find in NDS relating to the previous pools of the
same name were in the SLP DA's scope. Deleting them and trying the
remaining steps in the TID had no effect.

I'm about to restart the cluster in question and the SLP DA as well, but
i expect i am going to meet with the same lack of results.

Any ideas?