Microsoft KB Archive/27571

“Invalid Parameter” Error Message with DOS MODE Command

PSS ID Number: Q27571 Article last modified on 11-02-1994

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MS-DOS

= SUMMARY =

With some versions of DOS earlier than MS-DOS version 3.20, specifying perpetual retry through the DOS MODE command by typing MODE LPT1:,,P will result in the DOS error message “Invalid parameter.”

If you are using a DOS version earlier than MS-DOS version 3.20, try the DOS MODE command as specified above. If the “Invalid parameter” message results, upgrade your version of DOS to at least 3.20.

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