Hi Johan,
Can you kindly check if you are using the Latest Version of HOST AGENT as per your system architecture?
Because I also initially facing the same scenario during my Java Upgrade.
I downloaded the latest Host Agent from Marketplace Version 7.21 SP 13 and initial version was 7.21 SP10.
You can give it a try as SAP recommends to use the latest version while running the SUM Tool.
Thanks and Regards
Anurag