104030

Note the active NC program name displayed in the alarm detail and check the HMI program editor for the program that was running when the alarm triggered.

Open the NC program and scroll to the end to verify it contains a proper M30 or M2 program end command and percentage sign (%) on the last line.

Check for missing subroutine files if the main program contains subroutine calls (e.g., L-subroutines or external subprograms). Verify all called programs exist in the correct directory.

If the program appears truncated, reload the program from a verified backup source or re-transfer from the CAM system, ensuring proper DNC/file transfer completion.

Always maintain backup copies of proven programs before overwriting existing files.

Identify which tool number (T-word) was active when the alarm occurred from the alarm detail or current block display.

Navigate to the tool management screen (Tool List/Tool Offset) and verify the referenced tool number exists with complete data entries.

Check that the tool offset number (D-word) called in the program has corresponding offset data in the offset table for that tool.

Create the missing tool entry with appropriate parameters or correct the NC program to reference existing valid tool numbers.

Check the NCK diagnosis buffer for additional context about which data element is missing (access via Diagnostics > NCK > Messages).

If the program uses global user data (GUD) variables or cycle parameters, verify these are properly defined in the GUD definition files (_N_DEF_DIR) and have been activated.

Review recent parameter changes or system restores. Check if machine data or setting data backup needs to be restored from a known-good configuration.

Restoring machine data requires proper authorization and may affect machine geometry and compensation values.

If the issue followed a software update, verify all required optional packages and cycle definitions are properly installed and configured for your machine configuration.