Resource packs

Iris Error: GLSL Source Pre-Processing Failed

What it looks like in the log

org.anarres.cpp.InternalException: Bad token [ https://github.com/<so>,0]:" "

How to fix it

  1. Open Options > Video Settings > Shader Packs in Minecraft and switch to a known Iris-compatible shaderpack (such as Complementary, BSL, or MakeUp - Ultra Fast).
  2. check your log for 'Failed to load the shaderpack "<name>"!' to identify the exact broken file in your .minecraft/shaderpacks folder and remove it.
  3. Update Iris (and Sodium) to the latest release available for your Minecraft version, as newer versions fix many JCPP preprocessor incompatibilities.
  4. If you downloaded the shaderpack from GitHub or a file host, re-download the official release .zip rather than saving individual source files or HTML pages, and place the unextracted .zip directly in shaderpacks.
LoadersFabric, Quilt, Forge, Neoforge
SeverityBreaks something
CategoryResource packs

Check your own logDownload iris on 9Minecraft

Related errors

Resource packsCompletionException: RuntimeException: could not reload shadersOpen logs/latest.log and scroll below 'could not reload shaders' to find the 'Caused by:' line (typically ShadResource packsIris Crash: Shadow Program Requested, But the Pack Does Not Have a Shadow PassUpdate Iris Shaders (or Oculus if playing on Forge) alongside Sodium (or Embeddium) to the latest release for Resource packsIris Shader Compile Error: Undefined Variable iris_vertexColor in Entities AlphaUpdate Iris Shaders (or Oculus if playing on Forge/NeoForge) to the latest version available for your MinecrafResource packsIris Shaders Crash When Importing Shader Pack Settings (BaseOptionElementWidget NullPointerException)Relaunch Minecraft—this crash is a temporary menu race condition and does not permanently corrupt your game coResource packsIris Shaders Failed to Resolve Uniform: AmbiguityUpdate Iris Shaders (and Sodium) to the latest release for your Minecraft version, as duplicate `if(bool, vecNResource packsIris Shaders: GLSL Source Pre-Processing FailedOpen .minecraft/logs/latest.log and look just above 'GLSL source pre-processing failed' for 'Failed to load th