Enable DevMode to help with debugging - piotrulos/MSCModLoader GitHub Wiki

DevMode allows you to enable full stacktrace error logging directly into console, it also allows you to change some settings that may help with debugging like keep console log during reload, expands logging when Log-all command is enabled.

As of MSCLoader 1.2.6 to enable DevMode just add -mscloader-devmode to your startup parameters

As a reminder this mode is only for Debugging mods and shouldn't be used in normal gameplay.