Bug when KZ(2) > 2

[dipto4]

Hello,
I set KZ(2) > 2 so that in check.f, the timesteps can be changed. However, when KZ(2) > 2, I get the following error after sometime:
Error: No delay particle I 5 STEP 0.25000000000000000

What is going wrong here?

[lwang-astro]

Sorry for late reply. There is an index array of particles that sorted by the time steps. It is used to manage the block time step methods. When a KS binary form or a star is removed due to stellar evolution or escaping, the index array should have a consistent change. This error indicates one particle (probably a termination of KS or chain) is not properly insert to the index array. I suggest not to use KZ(2)>2, but keep it KZ(2)=1. If a calculation halt appears, it is better that you manually adjust the parameters (RMIN, DTMIN, ETA) in a restart file instead of automatically reduce time steps using KZ(2)>2. The latter anyway significantly reduces the performance of the code.