Working with PT 8.56, Windows servers, Pum Images
Please note that it is strongly suggested to have the Windows updates as of Jan 2017 or later for Tuxedo 12.2.2 (tuxedo12.2.2.0.0_VS2015) which is bundled with PT8.56.
For more information, see PeopleTools Certifications - Suggested Fixes Microsoft Windows Server (64bit) PT 8.56 (Doc ID 2289124.1).
While these are 'suggestions', we are seeing Tuxedo-related errors from those sites who do not have the updates.