E0005 — InvalidLifParam

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What happened

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Why

• alpha is not in (0, 1) — this means the leak factor is non-physical (exponential amplification or no decay)
• threshold is ≤ 0 — a non-positive threshold fires immediately or never
• beta is not in (0, 1) — same issue as alpha for the synaptic filter

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How to fix

1. Check the model’s tau_mem and dt values. If tau_mem is very small relative to dt, alpha = exp(-dt/tau_mem) approaches 0 and the compiler should have raised E0101. If you see E0005 at runtime, the artifact may be from an older compiler build that did not validate this.
2. Recompile with the current thrindex version: thx.compile(model, "model.thx").

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Example

E0005: invalid LIF parameter in layer 1: alpha=0.0
Why: alpha must be in (0, 1); value 0.0 would produce a trivial neuron.
Fix: set tau_mem > dt when constructing the LIF layer.
Docs: https://docs.thrindex.com/errors/E0005

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Related

• E0101 — the compiler-time check for tau_mem ≤ dt