At the time of Adapter release, it is possible that it is tested with few specific versions of software (or probably that was the only version available at that time). Software Versions released later may not be mentioned in the documentation.
Would suggest following as additional steps:
- Open a TS Ticket, it is possible that they have an updated list of versions supported.
- Check methodology used by Adapter to connect to applications. If it is using API, check if the APIs are backword compatible from new versions. Sometimes, It may be as simple as using a New Jar file from the application.
- If it is already purchased by your customer, give it a try, and then report the errors back to forum/support. IF someone faced those issues and solved it, you will get to know of the solution.