各位大佬好，我在使用python多进程的时候遇到了一个问题

def multi_process():
#    with ProcessPoolExecutor() as pool:
#    pool = mp.Pool(mp.cpu_count())
    with mp.Pool() as pool:
        pool.starmap(ISC, [(l, t) for l in range(2 * brCount) for t in range(Time)])

if __name__ == "__main__":
    for_start = time.time()
    multi_process()
    for_end = time.time()

函数ISC定义为：

def ISC(l, t):
    global ISCR_C
    ISCR_C[:, 0] = ISCR_A[l, :]
    ISCR_C[:, 1] = ISCR_Pmax
    ISCR_C = ISCR_C[np.lexsort(-ISCR_C[:, ::-1].T)]
    if l <= brCount - 1:
        for k in range(GenCount - 1):
            if ISCR1(k, t) * ISCR2(k, t) * ISCR3(l, k, t) == 1:
                opt.remove_constraint(model.branch_Cap1[t, l])
                break
    else:
        for k in range(GenCount - 1):
            if ISCR1(k, t) * ISCR2(k, t) * ISCR3(l, k, t) == 1:
                opt.remove_constraint(model.branch_Cap2[t,l - brCount])
                break

程序运行会报错：

 第一次用多进程，除了问题也不知咋回事，有没有大佬能救救孩子