Pd 0.52 removed the `error()` function (unfortunately, without a deprecation notice), but it can easily be replaced with `pd_error()`. To fix the code in the repo you can run something like this in the project root: ```bash rpl -R -x ".c" " error(" " pd_error(0, " . ``` [patch.txt](https://github.com/pd-projects/lyonpotpourri/files/7825287/patch.txt) A patch with the changes is attached.