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Error message: Device <device name> already open
Possible causes: Two tests are trying to access the same device at the same
time or the device is already busy running another process.
Error messages:
Open error on <device name>, or
Read error on <device name>, or
Write error on <device name>
Possible causes: Another application is currently using this device or the
device driver is not installed properly.
Error messages:
Paper out error on device <device name>, or
Off-line error on device <device name>, or
Busy error on device <device name>, or
Error on device <device name>
Possible causes: The parallel printer is either out of paper, off-line, busy
printing data, or some other error condition exists. Check the printer status.
Error message:
Expected <number> bytes, observed <number> bytes
Internal test failed on <device name>
Possible cause: Data transmission failed because you're running the internal
loopback with another test. The Serial Parallel Controller card must be
replaced.
Expected = <pattern>, observed = <pattern>
Internal test failed on <device name>
Possible cause: Data transmission failed, the card must be replaced.
Serial Parallel Controller User's Guide—February 1993
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