FANUC Alarm DNET-031 — ERR_STOP_C App dev file fmt err: Line …

Manufacturer wording — ERR_STOP_C App dev file fmt err: Line %d
The manual prints placeholders; your controller fills them in with the real group, axis or number.

FANUC DNET-031 (“ERR_STOP_C App dev file fmt err: Line …”): There is an error in the format of the specified device definition file, on the specified line. First check: Contact your FANUC Robotics technical representative to obtain a correct device definition file.

Updated 2026-09-17 · LogrobotLM reference

Indicative field information — the robot manufacturer's manual and safety procedures always prevail. Never bypass a safety device; apply lockout/tagout (LOTO) before any physical intervention. How this reference is built →