hi @soumen2025
The reason of this output could be two reasons:
- by any chance you didn’t modify anything outside of the markers ###Start and end code here###??
Deleting any part of the header or argument can give such output.
- Another reason would be
For code line open and read the content if you have used incorrect variable recall for the file, it should file_name as per argument.
Also as paul mentioned deleting and getting fresh copy would also be the work around in case you have modified anything in the file, or try deleting and clearing out kernel output, reconnect the kernel and re-run the cells from beginning one by one till you have the issue if you are confident of your codes being correct.
Regards
DP