Windows Err Msg: Cannot Read From Device AUX... (66079)
The information in this article applies to:
- Microsoft Windows 3.0
- Microsoft Windows 3.1
- Microsoft Windows 3.11
This article was previously published under Q66079 SYMPTOMS
When you use the debug version of Microsoft Windows version 3.0 or 3.1
without a debugging terminal, your system may stop responding (hang)
for a time, then the following error message is displayed:
Cannot read from device AUX: Retry/Cancel
CAUSE
The debug version of Windows is designed to wait for input from an
auxiliary debugging terminal. If you don't have a debugging terminal
attached to your system, the debug version of Windows cannot function
as designed.
WORKAROUND
To prevent this error message, either connect a debugging terminal or
reinstall the retail version of Windows.
To reinstall the retail version of Windows, do the following:
- From the MS-DOS command prompt, change to the Windows directory.
- In the Windows directory, type D2N
and press the ENTER key. D2N is a batch file that converts the
debug version of Windows into the normal version.
MORE INFORMATION
The "debug" version of Windows is designed for the Windows Software
Development Kit. This version reports errors more readily than the
retail version of Windows. For example, bringing up the LaserJet III
driver's setup screen causes an error to appear in the debug version
of Windows, but does not generate an error in the retail version.
The error reporting mechanism used by the debug version of Windows is
a "debug terminal." This is a dumb terminal connected to the
computer's AUX: port. When Windows reports an error, it immediately
sends information about the error to the debug terminal. After Windows
displays the error information, it sends a prompt of "Abort, Break,
Ignore?" to the terminal and waits for you to type an appropriate
command (A, B, or I).
If no terminal is hooked up, or the terminal is turned off, the error
codes are sent to a non-existent device. Also, you cannot type
anything into the system keyboard while Windows waits for input from
the debug terminal. After a period of time with no response from the
terminal, Windows displays the "Cannot read device AUX" error box.
Choosing Cancel causes Windows to exit, and choosing Retry causes
Windows to wait until there is a response on the terminal. A Retry
command can effectively lock your system if no debug terminal is
connected.
| Modification Type: | Minor | Last Reviewed: | 7/7/2005 |
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| Keywords: | KB66079 |
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