System Messages - Alphabetical List *Device in use* (-668) Explanation: An attempt has been made to attach, assign, or configure a hardware device (e.g., a VMI axis) that is already being used. User action: Check the program code to make sure the requested device has not already been attached. If the error occurs during power-up initialization of the eV+ system, enter the SRV.NET monitor command and look for multiple nodes that are reporting the same input or output block number. *Device not ready* (-508) Explanation: (1) The requested disk device (or remote network task) is not prepared to communicate with the eV+ system.
(2) A limited-access device like the terminal, the pendant, or a serial line is attached to a different program task. (3) You have tried to write into a pull-down window while it is displayed. User action: (1) If the intended device is a system microfloppy disk drive, make sure the diskette is correctly inserted and formatted. (2) If a limited-access device is specified, ABORT and KILL the program task that has it attached, or wait for the program task to release the device. If the intended device is on the network, verify that the proper connections are made and that the remote system is operating correctly.
(2) ABORT and KILL the program task that has the device attached, or wait for the task to release the device. *Device reset* (-663) Explanation: The device is busy processing a reset operation. The reset can have been requested (with a SETDEVICE instruction) by another program task that is accessing the device, or the device can have initiated the reset on its own. User action: Use software interlocks to prevent a second program task from accessing the device after a reset operation has been requested. (Note that the requesting SETDEVICE instruction waits for the reset to complete.) Refer to the documentation for the specific device for information on its self-generated resets.
*Device sensor error* (-662) Explanation: A hardware error occurred in the sensing system accessed with the last DEVICE instruction. User action: Refer to the documentation for the sensing system for information on how to determine the cause of the error. eV+Language Reference Guide, v2.x, 18319-000 Rev A Page 597