在做oracle standby时,出现ORA-12557错误.

1 确定你的环境变量,%ORACLE_HOME%\bin配置正确.

windows: c:\> echo $ORACLE_HOME    查看

2 确定你的$ORACLE_HOME\network\admin\listener.ora  是否监听 你目前的instance.

在$ORACLE_HOME\network\admin目录下是否有sqlnet.ora文件.

转网上的解决方法:

ORA-12557的解决过程

ORA-12557:

TNS:protocol adapter not loadable

Cause:

On some platforms (such as OS/2) protocol adapters are loaded at run-time. If the shared library (or DLL) for the protocol adapter is missing or one of its supporting libraries is missing then this error is returned.

Action:

For further details, turn on tracing and reexecute the operation. The trace file will include the name of the shared library (or DLL) that could not be loaded.

1. Make sure the %ORACLE_HOME%/bin directory is in your PATH.

2. Make sure the protocol is typed/specified correctly in your

tnsnames.ora file or whatever source you're using to resolve service

names.

3. TCP is the default protocol and is installed by default. If

you're using something different (like SPX) make sure you installed the

protocol adapter.

4. Make sure TOAD is using the correct oracle home if you have

multiple homes installed