PoissonGroup cannot be used inside odeint / JointEq: TypeError & UnexpectedTracerError[BUG]

[ikeyhg]

Hi BrainPy developers,

First of all, thank you very much for developing BrainPy — it is a very powerful and elegant framework for computational neuroscience.

I am trying to implement a classical decision-making rate model (similar to Wang 2002 / Wong & Wang 2006), using:

• bp.dyn.NeuDyn
• bp.odeint(..., method='exp_auto')
• bp.JointEq
• Poisson noise input

However, I consistently run into errors when using PoissonGroup inside odeint.

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Problem description

When PoissonGroup is used as an argument in ODE functions (e.g. noise-driven synaptic current), BrainPy/JAX raises errors such as:

TypeError: Cannot interpret value of type <class 'brainpy.dyn.others.input.PoissonGroup'> as an abstract array; it does not have a dtype attribute.

[github-actions]

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[Routhleck]

Could you provide your code?