Keyerror While Printing Trace In Pymc

I had read that by default some names are assigned to Stochastic vaiables. I am writing the relevant portion of my code below. lam = pm.Uniform('lam', lower=0.0, upper=5, doc='lam'

Solution 1:

You don't have a node called parameters_0. You only have lam, parameters, rv_0, rv_1, etc.