The issue is you have missed the command so you are just sending the filepath which on it’s own won’t do anything and as the file can’t be executed you are hitting a permission issue.
Ah yes, wc -l is what should count the lines here @Gabriele_Bracciali (it’s this command) so we can create batches for the correct number of lines afterwards. Good spot @jon!
Maybe worth using wc -l < /Users/gabrielebracciali/n8ntemp/{{ $binary.data.fileName }} even (so adding one more slash in case n8ntemp is a folder on its own and not just a filename prefix).