$ERR_DEVNOTRDY

107

Device not ready

The device accessed by an I/O statement was off‑line or otherwise not ready (the modem has hung up, the device is a network device that has been disconnected, and so forth), or one of the following OpenVMS system errors was received: SS$_DEVOFFLINE, SS$_HANGUP, SS$_DISCONNECT, or SS$_DEVINACT.