Hi, just to give some generic advice here, I suggest simulating fake data from your model and then fitting the model and seeing if you can recover the parameters. Since it’s taking a long time to run, I suggest just running your 4 parallel chains for 100 warmup and 100 saved iterations and set max treedepth to 5. Just to get things started, cos you don’t want to be waiting for hours every time you debug the model. That’s like what it was like when I took a computer science class in 1977 and we had to write our code on punch cards and then wait hours for it to get run through the computer.
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