1812117 - NoClassDefFoundError starting PI Mail Adapter

• After patching the Process Integration (PI) XIAF Software Component, the mail adapter fails to start.
• In the defaultTrace files, you see errors like "Caused by: java.lang.NoClassDefFoundError: com.sap.aii.af.sdk.xi.srt.MailReliabilityService".
• Below is an excerpt from the defaultTrace file:
  Processing HTTP request to servlet [ChannelMonitorServlet] finished with error. The error is: javax.servlet.ServletException: java.lang.reflect.InvocationTargetException
  at com.sapportals.htmlb.page.PageProcessorServlet.handleRequest(PageProcessorServlet.java:74)
  ...
  Caused by: java.lang.reflect.InvocationTargetException
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  ...
  at com.sapportals.htmlb.page.PageProcessorServlet.handleRequest(
  PageProcessorServlet.java:62)
  ... 31 more
  Caused by: java.lang.NoClassDefFoundError:
  com/sap/aii/af/sdk/xi/srt/MailReliabilityService
                            Loader Info
  ClassLoader name: [service:com.sap.aii.adapter.mail.svc]
   Living status: alive
   Direct parent loaders:
     [system:Frame]
     [library:com.sap.aii.sec.lib]
     [service:com.sap.aii.sec.svc]
     [service:com.sap.aii.af.svc]
     [service:com.sap.aii.adapter.xi.svc]
   Resources:
     /usr/sap/<SID>/DVEBMGS00/j2ee/cluster/bin/services/com.sap.aii.adapter.mail.svc/lib/com.sap.aii.adapter.mail.svc_api.jar

• SAP NetWeaver Process Integration 7.1
• SAP enhancement package 1 for SAP NetWeaver Process Integration 7.1
• SAP NetWeaver 7.3
• SAP enhancement package 1 for SAP NetWeaver 7.3

Process Integration 7.10, PI 7.10, Process Integration 7.11, PI 7.11, Process Integration 7.30, PI 7.30, Process Integration 7.31, PI 7.31, cache, Communication Channel Monitor, RWB, Runtime Workbench, NWA , KBA , BC-XI-CON-MAI , Mail Adapter , Problem