An SAP job when submitted by the DE Manager becomes stuck in READY state. The agent shows active in DE Topology as does the plugin for the SAP instance.
The agentparm.txt file may not contain all of the necessary details/parameters to allow SAP jobs to process.
In this particular instance, the agent had the plugin installed and the DE Manager showed the agent as available. However, the agentparm did not contain the communication alias name for the SAP plugin. After adding the communication.alias_n parameter to agentparm.txt and recycling agent, the SAP job processed as expected.