Hi Igor,
Did you find an answer to your question? I have a similar problem recently which I'm not sure how to figure out. I receive alerts that the job failed, however I see nothing exactly that indicates any failure and when I view the failed job history report we have on the production server I see: "The step did not generate any output. Process Exit Code 0. The step succeeded." The only explanation I may have that the custom report is somehow wrong or gather information wrongly?