102008

Review the NC program line that triggered the alarm and identify the file name being called (look for EXTCALL, CALL, or file operation commands).

Check the file name for invalid characters. Permitted characters are A-Z, 0-9, underscore (_), and hyphen (-). Remove or replace any spaces, special characters, or umlauts.

Verify the file name length does not exceed 24 characters total (including extension). For subprograms, use the format _N_FILENAME_SPF or _N_FILENAME_MPF.

Correct the file name in the NC program, ensuring it follows the format _N_PROGRAMNAME_SPF for subroutines or _N_PROGRAMNAME_MPF for main programs, then reset the alarm and restart.

Examine the program call statement and verify the file extension is present and matches the file type: _MPF (main program), _SPF (subroutine), _WPD (workpiece), _TOA (tool offset), _UFR (frame).

Check the actual file stored in the NC memory via HMI: Services > Program Manager and confirm the extension matches what is being called in the program.

Correct the file extension in the calling program or rename the file in NC memory to include the proper extension.

Renaming files in NC memory will affect all programs that reference this file. Check for multiple references before renaming.

Reset the alarm (NC RESET button) and test the program call to verify the file is now recognized correctly.

Check if the program call includes a path specification. SINUMERIK uses forward slashes (/) for directory separation in the format //NCK/PartProgram/DirectoryName/.

Navigate through HMI Services > Program Manager to verify the directory structure exists and the file is located in the specified path.

If using a path, ensure it starts with the correct root identifier. For NC programs use //NCK/ or relative paths from the current directory. Verify no backslashes (\) are used.

Modify the program to use the correct path format or move the file to the expected directory location, then clear the alarm and retest the program execution.