Gmx mdrun -deffnm NVT

GROMACS version:2018.1
GROMACS modification: No
I am getting the below error when I giving the command “gmx mdrun -deffnm NVT”

Too many LINCS warnings (1000)
If you know what you are doing you can adjust the lincs warning threshold in
your mdp file
or set the environment variable GMX_MAXCONSTRWARN to -1,
but normally it is better to fix the problem

I have used ATB to build topology

Have you run proper energy minimization beforehand?