"pyparsing.exceptions.ParseException: Expected string_end, found 'namespace' (at char 1249), (line:46, col:1) python/CMakeFiles/pybind_wrap_gtsam_unstable.dir/build.make:82: recipe for target 'python/gtsam_unstable.cpp' failed"

[rockywind]

Hi, I met the error bellow when I run the code(cmake --build build_gtsam --config RelWithDebInfo -j).