3471990 - "500 Internal Server Error" error in System Logon Screen SOAMANAGER

• "500 Internal Server Error" error in the browser Logon Screen or SOAMANAGER.
• R47 system log error is logged in SM21 ( "Delete ABAP session Txx_Uxxxx_M0 (Info = Error Message [Error/Core]" ).
• One of following errors are displayed on the relevant work process trace:
  

  A *** ERROR => Syntax error in program CL_ICF_NW07_LOGIN=============CP [abgen.c 2228]
  A {root-id=251C8C381F1D1EDFA5C11C6B6ED4D807}_{conn-id=251C8C381F1D1EDFA5C11C6B6ED4F807}_1
  A *** ERROR => > Include CL_ICF_NW07_LOGIN=============CM003 line 184 [abgen.c 2230]
  A *** ERROR => > The formal parameter "LABELEDCONTROLNAME" does not exist. [abcatchsynta 79]
  A DiagGetLoginQuietMode == TRUE, no rabax)
  A error during logon
  A cfunction CaughtSyntaxError::rabax
  A errcode SYNTAX_ERROR
  
  Or
  
  A  *GENER* locking program CL_ICF_NW07_LOGIN=============CP on secondary connection.
  A  *GENER* request remote generation: CL_ICF_NW07_LOGIN=============CP.
  A  DiagGetLoginQuietMode == TRUE, no rabax)
  A  error during logon
  A    cfunction CaughtSyntaxError::rabax
  A    errcode   SYNTAX_ERROR

• ICM trace contains following information
  

  [Thr ..] MPI.. PeekSelectInbuf 0 0 0 (0) -> MPI_EBROKEN: pipe broken/canceled
  [Thr ..] IcmIConnSelectPeek: MPI_EBROKEN: pipe broken/canceled on connection (..), parent: (..); see SAP Note 3215294; -
  [Thr ..] IcmReadFromPartner(id=..): read with maximum timeout 0
  [Thr ..] MPI.. GetInbuf 0 0 0 (0) -> MPI_EBROKEN: pipe broken/canceled
  [Thr ..] *** WARNING => IcmReadFromPartner(id=..): No data from server (invalid ..) received (see SAP Note 3215294), role: Server, (rc=MPI_EBROKEN: pipe broken/canceled/7), info: ..
  
  [Thr ..] DpGetContextRootId: .. in state DP_LOGON_STATE_LOGGED_OFF
  [Thr ..] IcmHandleReadFromPartner(id=..): No data from server received (rc = -1) {00a828b3} [icxxthrio.c 2643]

  
  [Thr ..] HTTP/1.0 500 Internal Server Error

• Following dump could be appear in ST22:
  

  OBJECTS_OBJREF_NOT_ASSIGNED
  CL_WDR_NW7_INT_WIN_ADAPTER====CP
  BC-WD-ABA-REN

  Access using a 'ZERO' object reference is not possible.

SAP_BASIS 758

500 Internal Server Error, SAP_BASIS 758, 758, ABAP webdynpro, SICF, CL_ICF_NW07_LOGIN, CL_ICF_NW07_LOGIN_HASH , KBA , BC-ESI-WS-ABA , Web Service and SOAP - ABAP , BC-CST-IC , Internet Communication Manager , BC-MID-ICF-LGN , ICF System Login , Problem