Downloading the SDK
The NEO Software Development Kit (SDK) includes:
The One Network Platform Studio, an Eclipse-based IDE for building applications
The One Network Platform Server, a server you can run on your machine to test your changes before publishing to the Developer Network
Please note that there are prerequisites for the SDK (Oracle and OpenJDK). Refer to the details in the download widget of the DevNet portal.
Once you've downloaded the SDK installer, run the executable. Then follow the prompts to complete the installation.
If you see either of the following errors:
ORA-12638: Credential retrieval failed
ORA-12514: TNS:listener does not currently know of service requested in connect descriptor
Then, open file C:\app\username\product\18.0.0\dbhomeXE\network\admin\sqlnet.ora in any text editor (file path should be as per your oracle installation) and either comment the following line (by putting # in front of the line) or change the value from NTS to NONE.
SQLNET.AUTHENTICATION_SERVICES= (NTS)
For a full walk-through of how to install the prerequisites and SDK, see: SDK Installation Instructions