Unable to create OU

I tried to use the “O” to create an “OU” but keep getting the error prompt “Entry not found in index”. However, I tried to use the same “O” on another machine running on the same lotus notes version, I’m able to create without any error.

I already tried to reinstall but still, the same error appear. Could it be my ID or some of the NSF file is corrupted?

Subject: Unable to create OU

It sounds like your registration server was set to local. Make sure you have it set to a server.

Subject: RE: Unable to create OU

I have set the Registration server to the correct Domino server.

Manage to resolve it. What I did is to remove all the certifier name in my personal address book! I suspect it may be corrupted when I created a few test O & OU.