If a file system task such as a rename fails, for example if the file does not exist, then this is considered an error by SSIS. This means the whole package fails. I can get aro
Check the FailPackageOnFailure and FailParentOnFailure properties of the FileSystem task and make sure they are set to False. Also, increase the MaximumErrorCount property of the package.
This combination will allow the task to fail and the package to still complete successfully.