using libsvm svmpredict output files are empty

i m trying to calculate accuracy of a system using SVM in libsvm, svmtrain makes a model , but svmpredict output files are empty..my program is..

trr=<408x11264 double>
tss=<204x11264 double>
users=102;
t1=4;
t2=2;

function P=svm_g3(trr,tss,users,t1,t2)
addpath(genpath('E:\libsvm-3.18\matlab'))

ltr=[];
for i=1:users
    for j=1:t1
        ltr=[ltr;i];
    end
end
lts=[];
for i=1:users
    for j=1:t2
        lts=[lts;i];
    end
end

      mod=svmtrain(ltr,trr,'-t 0 -b 1 d 3');
      [a1,a2]=svmpredict(lts,tss,mod);

      P=a2(1);

[Astha Ameta]

I am also facing the same issue, getting output file as empty [ ]

If anyone has any experience to this, please advise.

[Almost Artsy]

Have you got any solution for this problem ? It would be very helpful for me. Thanks a lot!!