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Navigate to Services > Tool Management and check which tool number is active when the alarm occurs. Note the tool and cutting edge number displayed.

Access Commissioning mode and open the tool data management. Review the cutting edge data for the affected tool, looking for unusual values, missing parameters, or syntax errors.

Create a backup of all tool data before making any modifications.

Delete and recreate the affected tool cutting edge data manually, ensuring all required fields (geometry, wear, type) are properly populated with valid numerical values.

Reset the control (power cycle) and reload the tool data. Test by calling the tool in MDI mode with a simple T command and M6.

Access the HMI Diagnostics and check the NCK memory utilization and file system status. Look for memory errors or file system warnings in the alarm log history.

From the commissioning level, export all tool data to an external archive file as backup, then use 'Services > Data > NCK > Delete' to clear tool management data.

This will delete all tool data. Ensure you have a complete backup before proceeding.

Perform a complete tool data initialization by reimporting the archived tool data or recreating the tool table from documentation.

If the error persists, perform a file system consistency check or restore the CF card data from a known good backup. Consider replacing the CompactFlash card if errors continue.

CF card replacement requires complete system backup and software reload.

Review the NC program line where the alarm occurs. Check the T-code and D-code syntax, ensuring the cutting edge number called exists in the tool data table.

Verify in Tool Management that the specified cutting edge (D-number) is actually defined for the called tool. Check if the cutting edge count matches the program requirements.

Correct the program by either adjusting the D-number to match existing cutting edges or adding the missing cutting edge data in the tool management system.

Test the corrected program in single block mode to verify proper tool and cutting edge loading without alarms.