ABC Sampling problem

[JenniferNPaige]

[Edited: originally a question about saving GP emulators and ABC sampling after, but see now the saving question is raised in Issues]

I am running into a bit of trouble trying to ABC sample from the emulator (specifically the GP). The code seems to hang, even if I adjust the number of samples to a small test case. I am having a hard time de-bugging this since no errors are thrown, the code just does not complete. Wondering if anyone has any tips!

Some example code I am trying is:

sampler = ABCSampler(model_gp, obs)
samples = sampler.sample(n_samples = 10, threshold = 0.5)

Thanks!