KiCad "Conflict problem between pins": the ERC pin conflict map
KiCad electrical rule check (schematic) message: Conflict problem between pins (pin_to_pin in kicad-cli reports).
What it means
Two pins on the same net have electrical types that should not be joined, such as two outputs driving each other or a power output tied to another power output. KiCad looks this up in the pin conflict map. Fix the connection, or correct the pin types if the symbol is wrong.
Common causes
- Two regulator outputs or two push-pull outputs tied together.
- A symbol with a pin typed as output that is really open-collector or bidirectional.
- Two power symbols with different names on one net (also reported as multiple net names).
How to fix it
- Separate the outputs or add the part that should sit between them.
- Correct the pin electrical type in a project copy of the symbol.
- Adjust the conflict map only if your team deliberately treats a combination as acceptable.
Where the setting lives
Schematic Setup → Electrical Rules → Pin Conflicts Map.
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Checked against KiCad 10's source and documentation. Last reviewed 2026-11-07.
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