The machine only with Oracle client and PLSQL developer13, Oracle database was installed in a virtual machine (server), the virtual machine operating system is a flagship Windows 7 SP1, database and the client are 12.1.0.2, 64 - bit, plsqldeveloper is 64 - bit, changed a 32-bit, TNS - ADMIN environment variable is set no problem, the virtual machine and native communication is normal, Telnet the virtual machine is fine for port 1521

CodePudding user response:

Plagued me for almost a day, finally found the reason, the Oracle client folder must be placed on plsqldeveloper installation directory, the perfect solution to oci. DLL cannot initialize, up sqlplus environment variable takes effect, it is really magic, I don't know what is this principle