: Some versions of Raven require the Essential Mod to prevent crashes during startup.
| Error Message | Likely Cause | Solution | |---------------|--------------|----------| | java.lang.NoClassDefFoundError | Missing dependencies | The JAR expects libraries in same folder or classpath | | java.io.IOException: Cannot run program | Corrupted or incomplete download | Re-download from original source, verify checksum (MD5/SHA256) | | Unsupported major.minor version 61.0 | Compiled with Java 17 but you have Java 8 | Upgrade to Java 17+ | | File not found: ravenbsclient189jar | Wrong path or extension | Use dir (Windows) or ls (Mac/Linux) to see exact name | | Antivirus deletes it immediately | False positive or genuine threat | Exclude folder after manual inspection, but proceed with caution | file name ravenbsclient189jar
: Never run this file unless you fully trust its origin and have scanned it in an isolated environment. : Some versions of Raven require the Essential
If the client requires arguments (such as a server IP or authentication token), you will need additional flags: Install Minecraft Forge 1
Because Raven is a Forge-based mod, you must install it into a Forge environment rather than as a standalone launcher. Install Minecraft Forge 1.8.9 Download the Forge 1.8.9 Installer