Class COM_ERROR_CONSTANTS

-- The hardware detected a break condition.

-- A parallel device is not selected.

-- No error

-- The hardware detected a framing error.

-- An I/O error occurred during communications with a parallel device.

-- The requested mode is not supported, or the handle
-- is invalid.

-- A parallel device signaled that it is out of paper.

-- A character-buffer overrun has occurred. The next character is lost.

-- A time-out occurred on a parallel device.

-- Receive queue overflow

-- The hardware detected a parity error.

-- The application tried to transmit a character, but the
-- output buffer was full.

-- Is an_error a known error?