2215222 - Syntax Error in Class CL_XMS_RUN_TIME_ENV Thrown in PI Message

• Messages are being sent from Process Integration (PI) to a receiver ECC system
• These messages are failing in PI with the error below
  <?xml version="1.0" encoding="UTF-8" standalone="true"?>
  <!-- Call Adapter -->
  < SAP:Error SOAP:mustUnderstand="" xmlns:SOAP="http://schemas.xmlsoap.org/soap/envelope/" xmlns:SAP="http://sap.com/xi/XI/Message/30">
  < SAP:Category>XIServer</SAP:Category>
  < SAP:Code area="INTERNAL">CLIENT_SEND_FAILED</SAP:Code>
  < SAP:P1>500 </SAP:P1>
  < SAP:P2>Internal Server Error</SAP:P2>
  < SAP:P3>(See attachment HTMLError for details)</SAP:P3>
  < SAP:P4/>
  < SAP:AdditionalText/>
  < SAP:Stack>Error while sending by HTTP (error code: 500, error text: Internal Server Error) (See attachment HTMLError for details) </SAP:Stack>
  < SAP:Retry>A</SAP:Retry>
  < /SAP:Error>
• The HTML Error shows the error below
  The URL call http://<host of receiver>:<port of receiver>/sap/xi/engine was terminated because of an error.
   
  Note
  The following error occurred in system <SID of receiver> : Syntax error in program CL_XMS_RUN_TIME_ENV===========CP .
  The error occurred on application server <host of receiver> and in work process. <x>
  The termination type was: RABAX_STATE
  The ABAP call stack was:
   Method: SET_MESSAGE_PROPERTIES of program CL_XMS_MAIN===================CP
   Method: IF_HTTP_EXTENSION~HANDLE_REQUEST of program CL_XMS_HTTP_HANDLER===========CP
   Method: EXECUTE_REQUEST of program CL_HTTP_SERVER================CP
   Function: HTTP_DISPATCH_REQUEST of program SAPLHTTP_RUNTIME
   Module: %_HTTP_START of program SAPMHTTP
• Within the receiver system a dump is thrown in transaction ST22
  Category                      ABAP Programming Error
  Runtime Errors             SYNTAX_ERROR
  ABAP Program              CL_XMS_RUN_TIME_ENV===========CP
  Application Component  BC-XI-IS-IEN
  Date and Time              <time and date>
  Short text                    Syntax error in program "CL_XMS_RUN_TIME_ENV===========CP ".
  

• SAP enhancement package 1 for SAP NetWeaver 7.3

Process Integration 7.31, PI 7.31, ABORT_MESSAGE_STATE, ERROR_MESSAGE_STATE, ST11, CL_XMS_MAIN===================CP, ENC_KEY, LS_ATTR, Application System, Integration Engine, Integration Server , KBA , BC-XI-IS-IEN , Integration Engine , BC-XI-IS , Integration Server , Problem