SIM7600 port overflow

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    Hello, I using SIM7600E and try set to transparent mode.
    I have problem with command AT+NETOPEN after i called this command
    I get response AT+NETOPEN\r\r\nOK\r\n\r\n+NETOPEN: 2\r\n
    Ok, I read it’s a port overflow error code

    I tried called AT+NETCLOSE, AT+CIPCLOSE=0, try wait for few seconds and try send AT+NETOPEN again, but doesnt work

    What i must do to make AT+NETOPEN successful?

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