COF10307I INCORRECT COMBINATION OF PARAMETERS.

Explanation
 You either did not specify a required parameter
or you specified mutually exclusive parameters on the VLFNOTE command.
additional message text explains the specific error.
 keywd1 AND keywd2 WERE
SPECIFIED BUT ARE MUTUALLY EXCLUSIVE.

Explanation
 You can specify only one of the displayed keywords
at a time on the VLFNOTE command.
 ‘MAJOR’ IS REQUIRED WITH
‘MINOR’ BUT WAS NOT SPECIFIED. or ‘CLASS’ IS REQUIRED WITH
‘MAJOR’ BUT WAS NOT SPECIFIED. or ‘DATASET’ IS REQUIRED WITH
‘VOLSER’ BUT WAS NOT SPECIFIED.

Explanation
 On the VLFNOTE command, if you specify the second
keyword displayed in the message, you also must specify the first
keyword displayed.
 NO ‘MAJOR’ OR ‘DATASET’ WAS SPECIFIED
WITH ‘ADD’ AND ‘CLASS’. or NO ‘MAJOR’ OR ‘DATASET’ WAS SPECIFIED
WITH ‘UPDATE’ AND ‘CLASS’.

Explanation
 If you specify CLASS and either ADD or UPDATE
on the VLFNOTE command, you must also specify the MAJOR or DATASET
keyword.
 NO ‘MAJOR’ OR ‘DATASET’ KEYWORD WAS SPECIFIED
WITH ‘ADD’. or NO ‘MAJOR’ OR ‘DATASET’ KEYWORD WAS SPECIFIED
WITH ‘UPDATE’.

Explanation
 If you specify ADD or UPDATE on the VLFNOTE command,
you must also specify the MAJOR or DATASET keyword. 
 NO
‘DATASET’, ‘CLASS’, OR ‘VOLSER’ KEYWORD WAS SPECIFIED WITH ‘DELETE’.

Explanation
 If you specify DELETE on the VLFNOTE command,
you must also specify the DATASET, CLASS, or VOLSER keyword for the
command to have any meaning. 
 NO ‘MINOR’ KEYWORD WAS SPECIFIED
WITH ‘ADD’ AND ‘MAJOR’. or NO ‘MINOR’ KEYWORD WAS SPECIFIED
WITH ‘UPDATE’ AND ‘MAJOR’.

Explanation
 If you specify MAJOR and either ADD or UPDATE
on the VLFNOTE command, you must also specify the MINOR keyword. 
 NO
DATA SET MEMBER WAS SPECIFIED WITH ‘ADD’ AND ‘DATASET’. or NO
DATA SET MEMBER WAS SPECIFIED WITH ‘UPDATE’ AND ‘DATASET’.

Explanation
 If you specify the DATASET keyword and either
ADD or UPDATE on the VLFNOTE command, you must also specify a data
set member. 
 NO ‘ADD’, ‘DELETE’, OR ‘UPDATE’ KEYWORD WAS
SPECIFIED.

Explanation
 You did not specify a command keyword that describes
the type of change made (addition, deletion, or update) on the VLFNOTE
command.

System action
 Processing continues with no change made to VLF
storage.

User response
 If you do not know the valid keywords and their
combinations, issue 'HELP VLFNOTE' for information about the VLFNOTE
command. If you do not have TSO/E operator authority, see z/OS TSO/E Command Reference for
descriptions of the VLFNOTE command functions that do not require
TSO/E operator authority. Reissue the VLFNOTE command with the correct
keywords.

Source
 VLFNOTE