Here is the Pastebin link to the crash report. The latest version of Forge as well as all previous versions produce this crash with Thutcore 3.0.3. I wish I could give you more info, but this is really all I have to show. I've tried all versions of Forge for 1.9 with Thutcore 3.0.3. I'm not sure how else to troubleshoot it.

Forge for 1.9 has been changing lots and lots of things since it came out, so is liable to crash for random reasons. I will see about re-compiling for the latest version probably tomorrow or so.

I think 3.0.3 was compiled against forge 1813.

no problem, tomorrow or so I will probably get around to compiling ThutCore as well as the pokecube mods for the latest 1.9.

Thanks for the quick response! I've really been looking forward to trying out PokeCube for 1.9 so thanks for doing this.

Uploaded new versions, note that there seems to be a rather major bug in forge/vanilla that causes crashes randomly on fluid flow and fire ticking.