Hey Snargables,
So there are a handful of answers that might be more specific if you give some detail on what errors, or where they are seen.
SSIS - yes you can handle warnings. Suppressing them is normally done on the package itself ( within settings/properties ). The best way to handle that would actually be setting logic in your package to pass those errors in a way that make the package not fail/throw unexpected warnings.
Let me know if that helps or you need any other clarification!
Regards,
Jeremy