Minolta CF5001 User Manual page 320

DETAILS: Error Message
If an error message is displayed after clicking on [Apply], a setting has not
been completed due to a machine operation in progress. The machine must
be in an idle state when you click on [Apply].
Click on [Back] to return to the E.K.C. Function Setting menu window or
any menu item to jump to the desired window.
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Setting E.K.C. Function (continued)