Hello, I tried to install Quickfix under pypy with the following code: pip3 install quickfix The installation was failed. The error contains the following error : C++/QuickfixPython.cpp: In function ‘PyTypeObject* SwigPyPacked_TypeOnce()’: C++/QuickfixPython.cpp:2132:7: error: invalid conversion from ‘printfunc {aka int ()(_object, _IO_FILE, int)}’ to ‘Py_ssize_t {aka long int}’ [-fpermissive] I would like to inform me if quickfix is compatible with pypy and if you could provide us a solution. Best, George