I am trying to use black-box likelihood functions with different samplers and I am facing issues with parallelization.
When using DE-Metropolis sampler, I am able to sample multiple chains but only when cores=1 is set, for cores>1 it does not start sampling (the progress bar is stuck). I face the same issue with DE-Metropolis-Z as well as Slice samplers.
Is there a general incompatibility issue with parallelization when a black-box likelihood function is used?
What might be the probable issue/reason for this behavior?