A recent Windows 2012 OS roll up patch causes the execution of any SSIS package to fail under the following conditions:
1. The package is using Microsoft.Jet.OLEDB.4.0
2. The Package is executed from a SQL job.
3. The OS is Windows 2012 on which the SQL is installed.
Snapshot of the error message:
MS has acknowledged the issue. Below link with details and workaround.
https://support.microsoft.com/en-us/help/4041692/windows-server-2012-update-kb4041692.
Applied SQL... 