ORA-12641 错误的一个解决办法
最初Oracle数据库装在HP-Unix上的，后来为了测试移植到Windows平台上，测试其他各项都没有问题，后来发现一个asp.net写的程序无法
最初Oracle数据库装在HP-Unix上的，后来为了测试移植到Windows平台上，测试其他各项都没有问题，后来发现一个asp.net写的程序无法访问，报错提示ORA-12641: 验证服务无法初始化，排除了.net用户权限问题之后，解决办法如下：将sqlnet.ora文件中的SQLNET.AUTHENTICATION_SERVICES=(TNS)修改为SQLNET.AUTHENTICATION_SERVICES=(NONE)，然后再连接即可连接成功，，sqlnet.ora文件位置在：\oracle\ora92\network\ADMIN 中（不同版本oracle可能不同）。
试过可以。
NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)
#SQLNET.AUTHENTICATION_SERVICES=(ALL)
SQLNET.AUTHENTICATION_SERVICES=(NONE)
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