我想做DCC-GARCH， 也下载了Kevin Sheppard 的工具箱，可是在MATLAB里运行的时候总是出现以下报错，Undefined function 'fattailed_garch' for input arguments of type 'struct'.
Error in dcc_mvgarch (line 82)
    [univariate{i}.parameters, univariate{i}.likelihood,
    univariate{i}.stderrors, univariate{i}.robustSE, univariate{i}.ht,
    univariate{i}.scores] ...
求大神指导，到底是程序包的问题还是其他。不甚感激