Hello I'm running Truss optimization example error as follows; Undefined function or variable 'readFil':

Error in TrussConfun (line 27)

out2 = readFil('TrussABAQUS.fil',101);

Error in fmincon (line 621)

[ctmp,ceqtmp] =

feval(confcn{3},X,varargin{:});

Error in Main_CODE (line 41)

[X,fval,exitflag,output,lambda]=fmincon(@TrussObjfun,x0,[],[],[],[],...

>> My computer runs win10 64 bit, Matlab R2015a, Abaqus 6.14-2

thank you very much