Error in Automatics modulation classification MATLAB example.

I want to generate the modultion types like (16APSK,32APSK,64APSK,128APSK) by modifying helperModClassGetModulator.m and helperModClassGetSource.m but i get the following error. I have atteched the file which i have modified.

Error using apskmod

Expected constellation points per circle to be integer-valued.

Error in comm.internal.apsk.validateM (line 14)

validateattributes(M, intDTypes, {'vector', 'integer', 'positive', ...

Error in apskmod>validateInputArgs (line 320)

comm.internal.apsk.validateM(mfilename, M);

Error in apskmod>processInputArgs (line 140)

plotConstellation, outputDataType] = validateInputArgs(M, radii, ...

Error in apskmod (line 130)

outputDataType] = processInputArgs(x, M, radii, varargin{:});

Error in helperModClassGetModulator>apsk16Modulator (line 238)

y = apskmod(x, radii, phaseOffset, 'symbolMapping', ...

Error in helperModClassGetModulator>@(x)apsk16Modulator(x,sps) (line 33)

modulator = @(x)apsk16Modulator(x,sps);