If your Eclipse project is not running on the BlueStacks emulator, follow these steps to fix the issue:

Check ADB Connection: Ensure BlueStacks is detected by running adb devices in the command prompt. If it's not listed, restart ADB using adb kill-server and adb start-server.

Enable Developer Mode: Go to BlueStacks settings and enable "ADB Debugging."

Correct Run Configuration: In Eclipse, ensure the target device is set to BlueStacks.

Check App Compatibility: Verify that your app supports the BlueStacks Android version.

Restart BlueStacks & Eclipse: Restart both to refresh connections.

Source of answer: - bluestacks vps