report some gurobipy.GurobiError: Element 0 of a double array is Nan or Inf.

[oneway3124]

C:\ProgramData\Anaconda3\envs\nilmtk-env\python.exe C:/Users/19002/Desktop/CVRPTW-Python-Gurobi/CVRPTW.py
Node X Y Demand Profit Et Lt St
0 1 82 76 NaN NaN NaN NaN NaN
1 2 96 44 19.0 20.0 10.0 11.0 30.0
2 3 50 5 21.0 32.0 13.0 15.0 15.0
3 4 49 8 6.0 11.0 11.0 12.0 15.0
4 5 13 7 19.0 23.0 16.0 17.0 30.0
5 6 29 89 7.0 6.0 9.0 13.0 20.0
6 7 58 30 12.0 18.0 14.0 16.0 15.0
7 8 84 39 16.0 21.0 10.0 14.0 60.0
8 9 14 24 6.0 11.0 13.0 14.0 15.0
9 10 2 39 16.0 20.0 16.0 17.0 30.0
Using license file C:\WINDOWS\system32\gurobi\gurobi.lic
Academic license - for non-commercial use only
Traceback (most recent call last):
File "C:/Users/19002/Desktop/CVRPTW-Python-Gurobi/CVRPTW.py", line 88, in
m.addConstr(z[i+1] >= (z[j+1] + st[j+1] + dist_matrix[j+1, i+1])*(x[j+1,i+1])) ## taking distance from one node to other as travelling time in minutes between those nodes
File "model.pxi", line 3247, in gurobipy.Model.addConstr
File "model.pxi", line 3158, in gurobipy.Model.__addConstr
gurobipy.GurobiError: Element 0 of a double array is Nan or Inf.

Process finished with exit code 1