The tutorial is available in both German and English.
It covers the Blender Exporter 1.2 and mentions the most common error messages. There also is a brief overview over the Octane UI and problems that you might run into.
http://blenderdiplom.com/index.php/de/t ... e-pitfalls
Also there is a new one coming on how to render that praying mantis with suitable materials, so be sure to check again next week.