The PROPATH value of a given PASOE instance can be found in the ${CATALINA_BASE}/conf/openedge.properties file, otherwise retrieved with the OEPROP command:
{CATALINA_BASE}/bin/oeprop.sh Appserver.Agent.oepas1.PROPATH
To have the PROPATH available for the Session Agent on startup, create a *_setenv.bat/sh script that gets executed at startup. See
Does Pacific AppServer have the "Environment Variables" tab? for more information.
Use this script to either set the PROPATH directly or call the "oeprop" comand to extract the PROPATH value from openedge.properties and add it to the environment.