error in running example

Dear All
I want to run heat transfer example to check the heat flux in the all directions. But I faced with below error:

ERROR: Dump custom fix does not compute per-atom vector (../dump_custom.cpp:1385)

My only change in the script is (in the heattransfer_2 example):
dump dmp1 all custom 800 post/dump*.heatGran id type type x y z ix iy iz vx vy vz fx fy fz omegax omegay omegaz radius f_Temp[0] f_heatSource[0] f_directionalHeatFlux[0] f_directionalHeatFlux[1] f_directionalHeatFlux[2]

How I can compute and write heat flux in different directions? Your any kind help is highly appreciated.

Best Regards