Version SSIS 2012. Package was originally 2005 ver. Package on file system.
DB Engine / Agent on Host 1, SSIS on Host 2.
Execution from Host 2 runs successfully. Execution from Host 1 gives the error in the question subject. Saw this post, but engine and agent are installed on Host 1. Has anyone seen this? Google returns no results when searching on the exact error (subject line is exact, wording is odd in the error message).