SQL$HELP72.HLB  —  Errors  SQL_ERRORS, BADCTXLEN
  Illegal length value found in context structure

  Explanation:  The LENGTH field of the context structure passed
  to the SQL procedure was illegal.  SQL supports only the global
  tid, which has a length of 16 (symbolically DDTM$S_TID).

  User Action:  Change the HLL code to pass a context structure
  whose only length is 16 (DDTM$S_TID).
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