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COBOL, Run-Time Messages, BUG_CHECK
 *Conan The Librarian 

  Internal consistency check failure

  Explanation:  The system detects a defect in the COBOL Run-time
  Library.  Under normal operation, this message should never appear.

  User Action:  Please report the problem via the normal problem
  reporting channels and include an example that reproduces the
  problem.
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