Type %appdata% into Run and press enter.Open Start on desktop > Open Run (Or you can use the Windows + R keyboard shortcut).(You can skip this step if you’ve installed Minecraft Forge) Right click Forge Installer, Run as Administrator and press OK to install Forge.Download Forge Installer, PTRLib-1.12.2.jar file.How to Install PTRLib 1.12.2 for Minecraft Some mods use PTRLib to run: DecoCraft, Camera Obscura Note that if you do not install this mod before installing the mod needs it to work, the system will report an error, causing crash and will not load into the main menu. Modes supported by the PTRLib typically use a common set of code, so that, to reduce file size, to save time and to optimize, Razzleberryfox, ProfMobius, and taelnia has included the code in the PTRLib. Instead of introducing new content into the game, it will provide documentation, code, and frameworks so that other mods can work properly. Programmed as a supported mod, the PTRLib will not provide any effect when installed independently in Minecraft, sometimes these mods only provide a few small items. Most mod developers have programmed many mods using this programming method. Thanks to the existence of these Core Mods, updating, fixing and modifying multiple mods is much more simple. Core mod is a trend with maximum resource savings and can support multiple mods at once.

PTRLib Mod 1.12.2 for Minecraft is a core mod of Razzleberryfox, ProfMobius and taelnia, used to run other mods, so it usually appears in the “required” section when installed.

Ptrmodellib 1.12.2 decocraft