How to rectify this error in generating matrix 729x729?

How to rectify this?

Actually here B is a list of 729 elements and each element is a 6 tuple. By 6-tuple, I mean to say each element is of length 6. i.e. 101110, 210110.. and so on.

 I want to generate a table/matrix (BxB) i.e. 729x729. , 
Kindly help me generating such a matrix.

>> i=0:2;

j=0:2;

k=0:2;

Np = 2;    %last state number for each entry, states are numbered from 0 to Np

K=2;

A=fullfact([3 3 3 3 3 3])-1;

B = char(A+'0');

>> states=B;

>> rownames = states;

>> varnames = states;

>> mtrx=cell(729,729);

>> AuthorTable = mat2dataset(mtrx, 'VarNames', varnames, 'ObsNames', rownames);

* *Error using setobsnames (line 29)
NEWNAMES must be a nonempty string or a cell array of nonempty strings.

Error in dataset (line 377)
                a = setobsnames(a,obsnamesArg);

Error in mat2dataset (line 75)
    d = dataset(vars{:},args{:});**