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Access the tool management screen (TM menu) and check the current number of active tools against the system's maximum tool capacity.

Review and delete obsolete or unused tool entries to free up memory space. Document tool numbers before deletion.

Always create a backup of tool data before deleting entries to prevent loss of critical tool information.

Check machine data MD18100 (MM_NUM_TOOL) and MD18110 (MM_NUM_CUTTING_EDGES_IN_TOA) to verify maximum tool configuration limits.

If limits are reached and more tools are required, contact your system administrator to evaluate increasing tool memory allocation through machine data modification and control restart.

Increasing tool memory limits requires control reboot and may affect system performance.

Verify the tool number being created in your NC program or HMI input. Note the exact tool number (T number) that triggered the alarm.

Access the tool list display and search for the tool number to confirm if it already exists in the tool management system.

If the tool exists and should be replaced, delete the existing tool entry first, then recreate it with new parameters.

Deleting an active tool may affect running programs. Ensure no programs reference this tool before deletion.

If the tool should be unique, assign a different unused tool number and modify your NC program or tool creation command accordingly.

Review the tool creation syntax in your NC program. Verify all tool parameters (type, geometry, wear values) conform to SINUMERIK formatting requirements and valid ranges.

Check for special characters or invalid data types in tool name fields. Tool names should contain only alphanumeric characters without special symbols.

Access Service mode and check the integrity of tool management files (typically _N_TOA_INI and _N_TOOL_INI files) for corruption indicators or read errors in the alarm log.

Service mode access requires appropriate authorization level. Incorrect modifications can cause system instability.

If corruption is suspected, restore tool data from the most recent backup file or reinitialize the tool management system and manually recreate tool entries.

Reinitializing tool management will erase all current tool data. Ensure complete backup exists before proceeding.