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FANUC Alarm INTP-251 — PAUSE Invalid utool number

Manufacturer wording — PAUSE (%s^4, %d^5) Invalid utool number
The manual prints placeholders; your controller fills them in with the real group, axis or number.

FANUC INTP-251 (“PAUSE Invalid utool number”): The tool frame number is invalid. First check: Refer to the error cause code.

Updated 2026-09-17 · LogrobotLM reference

Description

The tool frame number is invalid.

Remedy

Refer to the error cause code. Use MENU to display the Alarm Log screen.

Related codes

INTP-249PAUSE Macro is not set correctlyINTP-250PAUSE Invalid uframe numberINTP-252PAUSE User frame number mismatchINTP-253PAUSE Tool frame number mismatch

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 →