最近中聯服務器配置工具一直進不了，提示：ORA-12538: TNS: no such protocol adapter，網上找了一圈，也沒有找了多種方法，也沒有解決，看到這篇日志：
http://www.dba-oracle.com/t_iora_12538_tns_no_protocol_adapter.htm，看到最后：
Solutions:
If TNS_ADMIN is set then you should be able to use a network alias, not the full "(DESCRIPTION..." connect string. The TNS_ADMIN parm tells Oracle clients where to find the tnsnames.ora file.
Setting the ORACLE_HOME environment variable incorrectly on a Windows based system will create this problem.
因為機器裝了oracle8i的一個簡易客戶端，一個oracle 11g服務端，把ORACLE_HOME設置成了oracle 11g的主目錄，試着刪除，就可以了。解決!!!!!!!!