Correctly configure your AWI and your firewalls.
<tomcat>/webapps/awi/config/uc4config.xml as in the following example:
<configuration>
<logging count="10"></logging>
<trace count="10" xml="0"></trace>
<connections>
<connection name="AE Prod" Production" system="AEPROD">
<!-- FIRST NODE -->
<cp ip="aehost01" port="2217"/>
<cp ip="aehost01" port="2219"/>
<cp ip="aehost01" port="2221"/>
<!-- SECOND NODE -->
<cp ip="aehost02" port="2218"/>
<cp ip="aehost02" port="2220"/>
<cp ip="aehost02" port="2222"/>
</connection>
</connections>
</configuration>
- the firewall between Automation Engine nodes and the AWI server: observe and configure the necessary firewall exceptions so that the CP and AWI servers are mutually accessible. This concerns both external firewalls and OS firewall (for example Windows internal firewall).