I have a problem about calculating the cluster expansion of

Alloy Theoretic Automated Toolkit (ATAT)
1

I want to calculate the cluster expansion of ternary alloys. This is my lat.in file and VASP.Wrap file. After submitting the task, why gs.out is empty?

5.096 5.096 8.312 90 90 120
1 0 0
0 1 0
0 0 1
0.333330005         0.666670024         0.250000000  Ti,Nb
0.666670024         0.333330005         0.750000000  Ti,Nb
0.000000000         0.000000000         0.000000000  Ti,Nb
0.000000000         0.000000000         0.500000000  Ti,Nb
0.500000000         0.000000000         0.500000000  Ni
0.000000000         0.500000000         0.000000000  Ni
0.656589985         0.828289986         0.750000000  Ni
0.828299999         0.656589985         0.250000000  Ni
0.828299999         0.171709999         0.250000000  Ni
0.171700001         0.828289986         0.750000000  Ni
0.171700001         0.343409985         0.750000000  Ni
0.343409985         0.171700001         0.250000000  Ni
0.500000000         0.500000000         0.500000000  Ni
0.500000000         0.500000000         0.000000000  Ni
0.500000000         0.000000000         0.000000000  Ni
0.000000000         0.500000000         0.500000000  Ni

Many thanks in advanced!