% ncillegal -- Issue a warning about an illegal operation.
% ncillegal ('theOperation') issues a warning message
% that 'theOperation' (default = 'previous') is illegal.
% Copyright (C) 1997 Dr. Charles R. Denham, ZYDECO.
% All Rights Reserved.
% Disclosure without explicit written consent from the
% copyright owner does not constitute publication.
if nargin < 1, theOperation = 'previous'; end
warning([' ## The "' theOperation '" operation is illegal in this context.'])