- 400 – SKIP SIGNAL DURING RESTART
- 401 – INVALID TANGENT IN GROUP 1 CORNER ROUNDING – Haas Lathe
- 401 – INVALID TANGENT IN GROUP 1 CORNER ROUNDING OR CHAMFERING – Haas Mill
- 402 – POSSIBLE CORRUPTED FILE
- 403 – TOO MANY PROGS
- 404 – RS-232 NO PROG NAME
- 405 – RS-232 ILLEGAL PROG NAME
- 406 – RS-232 MISSING CODE
- 407 – RS-232 INVALID CODE
- 408 – RS-232 NUMBER RANGE ERROR
- 409 – RS-232 INVALID N CODE – Haas Lathe
- 409 – FILE INVALID N CODE – Haas Mill
- 410 – RS-232 INVALID V CODE – Haas Lathe
- 410 – FILE INVALID V CODE – Haas Mill
- 411 – RS-232 EMPTY PROG
- 412 – RS-232 UNEXPECTED END OF INPUT
- 413 – RS-232 LOAD INSUFFICIENT MEMORY
- 414 – RS-232 BUFFER OVERFLOW
- 415 – RS-232 OVERRUN
- 416 – RS-232 PARITY ERROR
- 417 – RS-232 FRAMING ERROR
- 418 – RS-232 BREAK
- 419 – INVALID FUNCTION FOR DNC
- 420 – PROGRAM NUMBER MISMATCH
- 421 – NO VALID POCKETS – Haas Mill
- 422 – POCKET TABLE ERROR – Haas Mill
- 423 – SERVO BAR EOB SWITCH POSITION UNKNOWN – Haas Lathe
- 423 – X SCALE/SCREW MISMATCH – Haas Mill
- 424 – SERVO BAR METRIC UNSUPPORTED – Haas Lathe
- 424 – Y SCALE/SCREW MISMATCH – Haas Mill
- 425 – SERVO BAR LENGTH UNKNOWN – Haas Lathe
- 425 – Z SCALE/SCREW MISMATCH – Haas Mill
- 426 – SERVO BAR ILLEGAL CODE G105 – Haas Lathe
- 426 – A SCALE/SCREW MISMATCH – Haas Mill
- 427 – INTERRUPT OVERRUN
- 428 – SERVO BAR SWITCH FAILURE – Haas Lathe
- 429 – DISK DIR INSUFFICIENT MEMORY
- 430 – FILE BEGINNING/END MARKER MISSING – Haas Lathe
- 430 – FILE UNEXPECTED END OF INPUT – Haas Mill
- 431 – DISK NO PROG NAME – Haas Lathe
- 431 – FILE NO PROG NAME – Haas Mill
- 432 – DISK ILLEGAL PROG NAME – Haas Lathe
- 432 – FILE ILLEGAL PROG NAME – Haas Mill
- 433 – DISK EMPTY PROG – Haas Lathe
- 433 – FILE EMPTY PROG – Haas Mill
- 434 – DISK LOAD INSUFFICIENT MEMORY – Haas Lathe
- 434 – FILE LOAD INSUFFICIENT MEMORY – Haas Mill
- 435 – DISK ABORT
- 436 – DISK FILE NOT FOUND
- 437 – TAILSTOCK UNDERSHOOT – Haas Lathe
- 438 – TAILSTOCK MOVED WHILE HOLDING PART – Haas Lathe
- 439 – TAILSTOCK FOUND NO PART – Haas Lathe
- 440 – SERVO BAR MAX PARTS REACHED – Haas Lathe
- 441 – SERVO BAR MAX BARS REACHED – Haas Lathe
- 442 – SERVO BAR MAX LENGTH REACHED – Haas Lathe
- 443 – SERVO BAR ALREADY NESTED – Haas Lathe
- 444 – REGEN ON TOO LONG – Haas Mill
- 445 – SERVO BAR FAULT – Haas Lathe
- 446 – SERVO BAR BAR TOO LONG – Haas Lathe
- 447 – SERVO BAR BAR IN WAY – Haas Lathe
- 448 – SERVO BAR OUT OF BARS – Haas Lathe
- 450 – BAR FEEDER FAULT – Haas Lathe
- 451 – BAR FEEDER SPINDLE INTERLOCK – Haas Lathe
- 452 – SERVO BAR GEARMOTOR TIMEOUT – Haas Lathe
- 453 – C AXIS ENGAGED – Haas Lathe
- 454 – C AXIS NOT ENGAGED – Haas Lathe
- 455 – G112 BLOCK ENDS W/O CANCEL CUTTER COMP – Haas Lathe
- 456 – PARAMETER CONFLICT – Haas Lathe
- 457 – AUX AXIS IS ENABLED
- 458 – LINEAR SCALES ENABLED WITHOUT MOTIF – Haas Mill
- 459 – APL DOOR FAULT – Haas Lathe
- 460 – APL ILLEGAL CODE – Haas Lathe
- 461 – APL GRIPPER TIMEOUT – Haas Lathe
- 462 – U OVER TRAVEL RANGE – Haas Lathe
- 463 – V OVER TRAVEL RANGE – Haas Lathe
- 464 – W OVER TRAVEL RANGE – Haas Lathe
- 468 – U LIMIT SWITCH – Haas Lathe
- 469 – V LIMIT SWITCH – Haas Lathe
- 470 – W LIMIT SWITCH – Haas Lathe
- 471 – OUT OF TOOLS – Haas Mill
- 472 – ATM FAULT – Haas Mill
- 473 – INVALID GEOMETRY – Haas Lathe
- 474 – G02 OR G03 NOT ALLOWED WITH G143 – Haas Mill
- 485 – USB RESET OCCURRED
- 486 – USB TIMEOUT OCCURRED
- 487 – USB DEVICE INAPPROPRIATELY UNMOUNTED