This is due to a Bug in the Versions 12.1.0 and 12.1.1 for product CA Automic Workload Automation component Agent Linux.
- use an agent of earlier main versions. Version 12.0.X Agents have been verified to work.
- permit the user directly or permit others (chmod 777) to access the file
Final Resolution will be to upgrade the Agent to 12.1.2 once it is available.
Planned Release Date for this Release is the 23rd of May 2018