Code 141-0025: Insufficient access rights for data change
Issue Description & Safety Warning
The Heidenhain TNC Series CNC has triggered a critical Insufficient access rights for data change alarm. Immediate attention from a qualified operator or maintenance technician is required to prevent secondary damage to the equipment or spoiled parts during the manufacturing cycle. Always ensure standard safety and LOTO procedures are followed before accessing electrical cabinets.
Official Troubleshooting Steps
'%1' '%2' [Cause of error] You do not have the access rights to change data. Perhaps you are running a cycle or NC program from a drive for which you do not have access rights. The message shows the data object for which more access rights are required. [Error correction] - The data cannot be saved. - Another code number must be entered. Run the cycle or NC program from a drive for which you do have the necessary access rights. - For a software update the system code number is required. 10/2023 [59]
Source: HEIDENHAIN NC Error Messages — TNC7/640/620/320/128, CNC PILOT 640, MANUALplus 620 (10/2023)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Heidenhain TNC Series CNC Alarms
Heidenhain controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code 141-0025 on the TNC Series CNC identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Heidenhain's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 4497 Heidenhain TNC Series CNC codes.
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