Error while trying to retrieve text for error ORA-12154错误

[delphisanding1]

我用PL/SQL连接远程服务器，数据库名为“SD”，但是连接就报这个错：Error while trying to retrieve text for error ORA-12154，问题出在哪？

本地的tnsnames.ora为以下：

# tnsnames.ora Network Configuration File: E:\oracle\product\10.2.0\db_1\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.

CHRIS =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = MICROSOF-3D3874)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = chris)
)
)
CHRIS_shared =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = MICROSOF-3D3874)(PORT = 1521))
(CONNECT_DATA =
(SERVER = shared)
(SERVICE_NAME = chris)
)
)
SD =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.2.252)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = sd)
)
)

SANDING =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = MICROSOF-3D3874)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = SANDING)
)
)

EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
)
(CONNECT_DATA =
(SID = PLSExtProc)
(PRESENTATION = RO)
)
)

[delphisanding1]

以前都好用的，后来不知道我本地的电脑做了什么修改。

[iqlife]

权限问题？

[delphisanding1]

[Quote=引用 2 楼 的回复:]
权限问题？
[/Quote]

应该不是的吧？我以前都好连接的。

隔了好几个月没去连了，现在就报着个错。

如果是权限问题，那要怎么修改？是到服务器上修改？

[delphisanding1]

什么缘故？在线等。。。

[delphisanding1]

chris和SANDING,是本地数据库。

SD是远程数据库。

[iqlife]

环境变量是不是变了？

修改系统环境变量：Path中Oracle部分的值映射到根目录下