Hi, First, try -DBoost_DEBUG=ON and compare what the module is trying to find, with what you actually have on disk, with what names and where. I always use the very latest CMake. If I can not use the latest (e.g. Visual Studio 2017/2019 integration with CMake), then I download the latest FindBoost.cmake, like so https://github.com/boostorg/gil/blob/develop/CMakeLists.txt#L52-L76 Here, I keep notes on issues I encounter while using the latest FindBoost.cmake https://github.com/boostorg/gil/blob/develop/CONTRIBUTING.md#using-cmake Now, assuming you have CMake 3.13+ or latest FindBoost.cmake, in case you have built Boost with --layout=versioned (default on Windows) 1. Hint CMake about architecture: -DBoost_ARCHITECTURE=-x64 Learn more here https://gitlab.kitware.com/cmake/cmake/merge_requests/2568#note_479997 2. Hint CMake about compiler:-DBoost_COMPILER=-vc141 (or -DBoost_COMPILER=-gcc5 or any compiler you used) 3. If still failing, -DBoost_DEBUG=ON and analyze the output again, and again Regards, Mateusz Loskot ----- -- Mateusz Loskot, http://mateusz.loskot.net -- Sent from: http://boost.2283326.n4.nabble.com/Boost-Users-f2553780.html