104233

Check if the NC program was modified since the last interruption using the file timestamp or version history in the program manager.

If program was modified, perform a complete program reset by pressing RESET and then execute a controlled restart from the beginning or a known safe position.

Do not attempt to resume from the saved load point if program structure has changed.

Restore the original program version from backup if the modification was unintentional and the previous state needs to be recovered.

Re-execute the program from the start or use the repositioning function to manually approach the desired starting position.

Verify tool and workpiece position before restarting to prevent collisions.

Verify the block number or label you are searching for actually exists in the loaded NC program by opening the program in the editor.

Check SERUPRO settings in the control: ensure search mode (with/without calculation) is appropriate for your application and program structure.

If using label-based restart, confirm the label syntax is correct and matches exactly (case-sensitive) with the program label.

Perform a block search with calculation from a known valid starting block, or restart the program from the beginning if the load point cannot be resolved.

Block search with calculation may take several minutes on long programs.

Acknowledge the alarm and check the NC program for corruption by scrolling through it in the editor, looking for unusual characters or incomplete blocks.

Delete the current program from the control memory and reload a fresh copy from a verified backup source (CF card, network, or USB).

Ensure you have a backup before deleting the program.

Perform a system data backup and check NCK file system integrity through the commissioning diagnostics menu (Service > File System).

If file system errors are detected, contact Siemens service support or perform a controlled NCK reset and restore from a known good backup.

NCK reset will erase all machine data - only perform if you have complete system backup.