I'm working on binary black hole mergers with large mass ratio (20:1 or more). By using higher refinement level, I have been able to resolve the smaller BH, but it doesn't remain resolved even for a single time step. 

So far, I have tried changing the CarpetRegrid2::regrid_every and AHFinderDirect::find_every to as small as 1. 

Could someone please help me where I'm going wrong? I'm sure there are other problems too with my parameter file. I have attached the par file if anyone would be kind enough to give me further suggestions for this problem.

Thanks,

Rahul