Hi - I've got exactly the same problem after upgrading from IDS 10.00 to 11.70 on AIX 6.1. I cannot connect via TCP/IP as the root user as I get error 951. I can connect ok using shared memory and streams, but not TCP/IP. We upgraded to 11.70 over the weekend and nothing has changed on the users/passwords side of things. I can connect via any other user (including Informix). Very frustrating !! Anyone any ideas ?
I have been advised by Informix Support to check (amongst other files) the .rhosts file in the root directory and to make sure that an entry exists for the current server name. No entry for the current server name was listed in the file, so I added one and now I can connect finally connect to TCP/IP as the root user. Hope this helps