2118012 - Error on upgrade from Sybase IQ 12.7 to SAP IQ 16

When attempting to migrate from Sybase IQ 12.7 to SAP IQ 16 using iqunload utility, IQ aborted with the following error.

> iqunload -au -c "dbf=/PATH/IQ.db;uid=user001;pwd=pass001" -ms_filename "/PATH/FILE" -ms_size 1023

   **************************************************
   *** Sybase IQ Abort:
   *** From: oslib/hos_eom.cxx:122
   *** PID: 18612590
   *** Message: objects still registered on hos_ObjectStack when ~hos_ObjectStack() called
   *** Thread: 1 (TID: 0)
   **************************************************
  
   oslib/hos_stacktrace.cxx: line 407: No Server object, OS context server or thread manager presents.
   ***** SQL error: Unable to start database server
 
  [Stacktrace]

    Dump all thread stacks at oslib/hos_eom.cxx:122
   ...
    .hos_ABORT(const char*,unsigned int,const char*,char*,char*)+0x280()
    .hos_ObjectStack::~hos_ObjectStack()+0xc4()                        
    .hos_ExObjectManager::~hos_ExObjectManager()+0x124()               
    .hos_context_server::~hos_context_server()+0x29c()                 
    .st_server::~st_server()+0x1a8()                                   
    .IQshutdown()+0x7c()                                               
    .saint_iqthresholdctl::ShutDown()+0x10()

• SAP IQ 16

KBA , BC-SYB-IQ , Sybase IQ , Problem