Function SCIPcreateNlpiProblem 

pub unsafe extern "C" fn SCIPcreateNlpiProblem(
    scip: *mut SCIP,
    nlpi: *mut SCIP_NLPI,
    problem: *mut *mut SCIP_NLPIPROBLEM,
    name: *const c_char,
) -> SCIP_RETCODE

creates an empty problem instance