Block self-test failed
✕ errorassert/failed
What it looks like
Buck converter's own spec says the node at R2.1 should sit at 1.02 V — it solves to 0.4 V. Something in this block's values or wiring no longer does what the block claims.
What it checks
Blocks can carry assertions — 'this node sits at this voltage when I'm working'. The DC solver computes the actual value and compares. A failed assert means the block no longer does what it claims.
Why it matters
It's a built-in self-test for edited circuits: change a feedback resistor inside a regulator block and the output moves, but every label still says the old voltage. The assert catches the lie at the exact node.
How to fix it
Either restore the internals that made the claim true, or — if the change is deliberate (you re-tuned the output) — update the block's asserted value so the claim matches the new truth.
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