On Solaris, the Agent does not include a bundled JRE. This must be installed on the Solaris server in advance.
Having installed a JRE and set the JAVA_HOME variable, the install fails with the following error:
"No Java virtual machine could be found from your PATH environment variable"
The same error occurs with a silent install, having specified the JRE path in the DJVM_PATH and DJVM_DOT parameters like in this example:
setup.bin -i silent -DACCEPT_EULA=ACCEPT -DAGENT_UPGRADE_FORCE=true -DUPGRADE_ACTIVEJOB_CHECK=false -DAGENT_UPGRADE_PATH=/opt/CA/WA_AGENT -DUSE_BUNDLED_JVM=false -DJVM_PATH=/opt/jdk8u282-b08/jre/bin/java -DJVM_DOT=/opt/jdk8u282-b08/jre
The $PATH variable also includes the JRE path:
Release : 11.5, 12.0
Component : CA Workload Automation System Agent
The Agent upgrade is unable to resolve the JRE path from the $PATH variable due to the order of the paths.
You will need to ensure the JRE path is positioned at the very beginning of your $PATH variable like
Remove any duplicate entries from the $PATH variable to ensure the JRE path is only present at the very beginning of the $PATH variable value.
After this, you will be able to upgrade the Agent to 12.0 on Solaris.