LTP Model not loaded!

报错：Segmentor: Model not loaded!
Postagger: Model not loaded!
Parser: Model not loaded!
Parser: Model not loaded!
SRL: Model not loaded!

import os
from pyltp import Segmentor, Postagger, Parser, NamedEntityRecognizer, SementicRoleLabeller,
class LtpParser:
    def __init__(self):
        LTP_DIR = "E:/shixixiangmu/Extraction/ltp_data"
        cws_model_path = os.path.join(LTP_DIR, 'cws.model')
        self.segmentor = Segmentor("cws.model")

        pos_model_path = os.path.join(LTP_DIR, "pos.model")
        self.postagger = Postagger("pos.model")

        parser_model_path = os.path.join(LTP_DIR, "parser.model")
        self.parser = Parser("parser.model")

        ner_model_path = os.path.join(LTP_DIR, "ner.model")
        self.recognizer = NamedEntityRecognizer("ner.model")

        pisrl_win_model_path = os.path.join(LTP_DIR, 'pisrl_win.model')
        self.labeller = SementicRoleLabeller('pisrl_win.model')

pyltp版本0.4.0，ltp模型3.4.0，地址\ /都试过，