2047774 - Non-Fatal Error at s_bm_priv.h with stack at v2s_bmcontext::bmselfcpytail1 - SAP IQ

• Suddenly any DML query (Insert, Update, Delete) on a specific table was returned Error  's_bm_priv.h: .'.
• The table has more than 20 billion rows. Dropping HG & LF indexes on the table didn't helpful from the error.
• sp_iqcheckdb of the table returned "No Errors Detected".

• Following error messages and Stack maybe reported in the iqmsg file:

• Example 1:
  ********************************************************
  **       Non-Fatal IQ Internal Error Detected
  **       at /cm/iqa/include/s_bm_priv.h:1215  on thread 1196 (TID 1187)
  **       Bitmap failed verify checks. ...
  ********************************************************         
  v2s_bmcontext..bmselfcpytail1
  v2s_bmcontext..bmselfsetrng
  s_bm..SetBitsEyyi
  s_bmTSCursor..FlushEv
  hs_dpInsert..Insert..s_IndexIteratoriiPKc
  hs_dpUpdate..Update s_IndexIterator_UpdatePageSetiPK
  ...
  Bitmap failed internal checks. You may have a damaged index. Please check your IQ message file for additional information.  -- (/cm/iqa/include/s_bm_priv.h 1215)

• Example 2:
  ********************************************************
  **
  ** Non-Fatal IQ Internal Error Detected
  ** at /home/iqabuild/views/links/r16.0.0_sp11_nbld_linux_64/gitsrc/cm/iqa/include/s_bm_priv.h:1257 on thread 140685555537664 (TID 2303)
  ** with Query_Name: query1
  ** Bitmap failed verify checks. ...
  ********************************************************
  sbm_exception::sbm_exception
  v2s_bmcontext::bmselfcpytail1
  v2s_bmcontext::bmselfunion
  s_bm::SetBits
  s_workingGroup::Complete
  s_gInsertCursor::CompleteOneGroup
  hs_ohcInsert::CompleteGroup
  hs_ohcInsert::DoInsert
  dfo_HGIndexInsert::FetchOpus
  df_CombinerFetchContext::Fetch
  hc_dfrun::FillRun
  hc_dmfrun::InitNextWorkUnit
  ...
  Bitmap failed internal checks. Please check your IQ message file for additional information.

SAP IQ 

Bitmap failed verify checks ,CR 818612,CR 824681,CR 824507,bmselfcpytail1,SetBits,s_bm_priv.h,v2s_bmcontext..bmselfcpytail , KBA , BC-SYB-IQ , Sybase IQ , Known Error