Short dump - CX_SY_OPEN_SQL_DB during MODIFY statement

In production system, sometimes it dumps with this error:

Runtime Errors         DBIF_RSQL_INVALID_RSQL 
Exception              CX_SY_OPEN_SQL_DB

And here is the code cause this problems:

CALL FUNCTION 'ENQUEUE_E_TABLE'  EXPORTING   mode_rstable = 'E'  tabname     = 'ZVKN_TRPHIST'.
MODIFY zvkn_trsphist FROM TABLE lt_trsphist. <<<<<< Error
CALL FUNCTION 'DEQUEUE_E_TABLE'  EXPORTING  mode_rstable = 'E'  tabname = 'ZVKN_TRPHIST'.
IF sy-subrc EQ 0.  return-type = 'S'.
ELSE.  ROLLBACK WORK.  return-type = 'E'.
ENDIF.

I have tried to use ENQUEUE statement with WAIT but no succeed. How to manage with no dump?