Hello developers, I have got an error : Attempt to execute SCRIPT vl_ikmeanspush as a function

I run this function of VLFeat library in matlab version 2017b (64bit windows 10).

I = vl_ikmeanspush(uint8(var2.D), int32(codebook));

where the this function is:

% VL_IKMEANSPUSH Project data on integer K-means partions % I = VL_IKMEANSPUSH(X,C) projects the data X to the integer K-meanns % clusters of centers C returning the cluster indeces I.

% See also: VL_IKMEANS(), VL_HELP().

% Copyright (C) 2007-12 Andrea Vedaldi and Brian Fulkerson. % All rights reserved.

% This file is part of the VLFeat library and is made available under % the terms of the BSD license (see the COPYING file).

output: error: Attempt to execute SCRIPT vl_ikmeanspush as a function: E:\cpmc-\external_code\vlfeats\toolbox\kmeans\vl_ikmeanspush.m