Import error in MATLAB -

i'm brand new matlab , having trouble importing module called sigtool. code:

>> path('/space/jazz/1/users/gwarner/sigtool/program') >> sigtool 

returns:

undefined function 'fileparts' input arguments of type 'char'.  error in sigtool (line 72) parentdirectory=fileparts(which('sigtool')); 

the weirdest part i've been able open before. used same code , haven't edited sigtool directory or changed it's path since. ideas?

your usage of path wiping out matlab's default search path. if change first line

path(path,'/space/jazz/1/users/gwarner/sigtool/program') 

the path added bottom of search stack. can add directory top of stack using addpath:

addpath('/space/jazz/1/users/gwarner/sigtool/program')