dist function error when calculating largest lypaunov exponent

Hi,

I am trying to calculate the largest lyapunov exponent of my time series using the Lyaprosen code. When i run it, i get the following error;

??? Undefined function or method 'dist' for input arguments of type 'double'.

Error in ==> lyaprosen at 106 Dmm=dist(EEMmm(:,1:k)');

I have searched everywhere for answers and have come up with nothing. Could it be that my version of Matlab does not support this dist function?

Any help would be appreciated.

Thanks.

[S Coogan]

I should also add that the same dist error appears when i attempt to find fnn.