Have a customer that is going to upgrade to 2018. One thing I'll always try to do is get them to the latest Sage product updates. This is especially true when you have modifications because it's usually not simple to upload just the PU without re-installing the other enhancements and sometimes involving the third-party developers.
This customer is using Job Ops. The **Job Ops site appears to list 2018 PU 2 as the latest supported release**.
Emailed the Job Ops developer --
According to support:
**At this time, we do not plan to become compliant with product update 3. We are focusing development on the 2019 release.**
For reference - I believe PU 4 release is due this month, with 2019 ETA rumored for March 2019
How you can be the endorsed Sage 100cloud Manufacturing system and not be required to stay current on PU is a mystery which escapes me.