Home › Forum › SofaPython3 › Getting Started › Python runtime fatal error with GIL Tagged: AppleClang, MacOS, SOFA_2012 This topic has 1 reply, 2 voices, and was last updated 2 years, 6 months ago by Hugo. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts 3 May 2021 at 20:00 #19354 ZilinBlocked Hi, I have installed the Sofa and SofaPython3, however, when I import Sofa, an error showed up as follows: Fatal Python error: PyMUTEX_LOCK(gil->mutex) failed Python runtime state: unknown zsh: abort python My system is macOS 10.15.7 and I linked the Sofapython to an environment in anaconda. My pybind11 version is 2.6.2 installed from anaconda. I searched online, and it seems to be some issues when compiling with pybind11, however, I am not sure how to solve it. Could you help and give some suggestions? Thank you so much! 31 May 2021 at 23:01 #19611 HugoKeymaster Dear @zilinsi Did you compile both SOFA and SofaPython3 yourself from sources? or did you use the binary distributed on our download page? Best, Hugo Author Posts Viewing 2 posts - 1 through 2 (of 2 total) You must be logged in to reply to this topic.