Hello, I'm unfortunately not familiar enough with the platform (Windows) or this compiler (MSVC) to help, but I would like to add some notes in case someone else on this list has ideas: Compiling a trivial C++ applet based on code such as https://boostorg.github.io/python/doc/html/numpy/tutorial/ndarray.html on Linux simply requires a command such as ``` g++ -I /usr/include/python3.8 -o np_test np_test.cpp -lboost_numpy38 -lboost_python38 -lpython3.8 ``` I find particularly confusing that the MSVC linker would generate a missing symbol error for the `ndarray::get_data()` function, given that this function (as defined in https://github.com/boostorg/python/blob/develop/include/boost/python/numpy/n...) ought to be inlined, and not generate a symbol at all. Does anyone familiar with this platform have an idea under what circumstances this may result in a link error ? (See the exact command-line in the previous post). Thanks, Stefan -- ...ich hab' noch einen Koffer in Berlin...