Q:

An author of a paper included a blank supplementary file.  Is it possible to make the journal correct this? 

The authors of a paper explicitly wrote that they included their code as a supplementary file, and the file is actually available, however, it only includes the header and no code whatsoever.  Is it possible to make the journal take notice and correct this issue? 

A:

If a file is missing or appears to be missing, then the editor in charge of the paper should obviously be notified, since he or she is the person responsible for managing communications between the authors and the reviewers. ( I have done this before when there was an obvious missing document.)