ORA-12437: invalid policy option: string
Cause: A value that was not a valid policy option was entered.
Action: Correct the policy option value.
ORA-12437表示无效的策略选项。
ORA-12437: invalid policy option: string
Cause: An attempt was made to set or alter a policy option with an illegal value.
Action: Choose a legal value for the policy.
当在执行dbms_network_acl_admin.set_policy例程时，传入一个无效的参数，可能会引起ORA-12437错误。
1.检查代码中传入的参数。
2.确保正确的参数传递给dbms_network_acl_admin.set_policy例程。
3.重新运行代码，检查是否发生ORA-12437错误。