During a silent installation of the agent, if you do not provide AGENT_INSTALL_MODE=<val>, the installation fails.
Workaround:
Ensure that you provide the AGENT_INSTALL_MODE with the appropriate value during silent installation. For example, AGENT_INSTALL_MODE=1 for managed agent, and AGENT_INSTALL_MODE=2 for standalone agent.
This issue has been resolved in Symantec™ Embedded Security: Critical System Protection release 1.0.1.