trap divide error

[camilocs89]

Hi!
I'm training another combinatorial problem and it works well. But, sometimes when I run ./run_nstep_dqn.sh this is stopped without error message.

In the system log appears this:

kernel: traps: python[7276] trap divide error ip:7f96bd2cea0b sp:7fffbb710190 error:0 in libcapmds.so[7f96bd202000+106000]

I think that occur because is trying divide a floating-point by zero, but what could be the cause of it?
Thanks.

[Hanjun-Dai]

Hello,

Sorry I have no idea where it could be wrong.
One place to look at is the per step reward, which will be divided by max norm. If it becomes zero then that might be problematic.

https://github.com/Hanjun-Dai/graph_comb_opt/blob/master/code/s2v_maxcut/maxcut_lib/src/lib/maxcut_env.cpp#L71

[camilocs89]

Yes, that was the problem, thank you!