>Have you created a symlink /oracle/client/10x_64 which points to /oracle/client/11x_64?
no, but the same problem if i do the symlink
| lrwxrwxrwx 1 ora<SID> dba | 6 Apr 30 11:22 10x_64 -> 11x_64 |
>And have you changed the logon scripts of all users?
yes, ora<SID> and <SID>adm