Mr_Simplex

Thanks! That's solved the problem, I'm now able to launch minecraft from eclipse. By the way, the forge version was 28.0.75

So to say simply: I don't know

sorry for the late reply, it seems that I tried updating my mod to 1.15 last time and it was unsuccessful. All the references to the version say 1.15 (even though I know it was never updated to 1.15).

Thanks, I'll have a look

My mod doesn't have a custom config, a config handler or any other mods in the workspace. (I also haven't been back in my workspace in a while so all these comments are from what I can find/remember)

Are you refering to my mod.toml class? If so here it is: I have looked through it and cannot find any problems.

My mod has been launching fine, until just recently when Eclipse has been giving me this error: I have tried launching using a "runClient.bat" with the code "/gradlew runClient" to no avail. All help would be most appreciated, thanks.