After running the pre-upgrade assessment tool (APUAT) for the Aria Operations upgrade from 8.16 or 8.17.x to 8.18.x, warnings are present for the following headings in the report;
Aria Operations 8.14.x
Aria Operations 8.16
Aria Operations 8.17.x
These warnings can be safely ignored, and the upgrade process can continue as planned.
Both vRA 7.x and EPOps agents have not been supported since vROPS 8.3 and 8.6, respectively.