将存储过程load in editor，设置断点，运行后依次发生下列错误提示：
ORA-12560: TNS:protocol adapter error
Cannot connect debug session. In order to debug when connected to a RAC instance you must have entries for the individual RAC instances in your tnsnames.ora file or connect directly to an individual RAC instance.
源文档 < http://asktoad.com/DWiki/doku.php/faq/answers/procedure_editorDokuWiki=e217ad0ed5bdf990bcc4b95bb9be96b9 >
When using the PL/SQL Debugger with a RAC database, you must either have an additional entry in your TNSNames.ora file for the connected instance, or you must connect directly to an instance of the cluster without letting the server assign an instance.
During debugging, Toad creates two background sessions for handling debugger calls, called the Target and Debug sessions. These two sessions must be created>
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