tb — Apollo

2.0;tb (traceback), revision 2.0, 81/07/01
TB (TRACEBACK) -- Print traceback after a fault.
usage:  TB


FORMAT

  TB

  TB prints a traceback after a fault.  The traceback lists the
  names of the routines leading from the fault back to the main
  program, and includes the line number at which each routine was
  called.  Up to 32 levels of calls can appear.  If the sequence
  exceeds 32 calls, the first 16 and last 16 are shown in the
  traceback.

  TB requires no arguments or options.

  ** NOTE **

  There is a synonymous DM command: TB -- To bottom of window.  Type
  HELP TB_DM for details about that command.


EXAMPLE

  The traceback from a floating-point error
  might resemble the following:

      $ TB
      overflow in multiply (from library/floating point)
      In routine "EXTRAPOLATE" line 25
      Called from "REFLECTION" line 192
      Called from "$MAIN" line 19
      $

  In this example, an overflow error occurred in a
  floating-point multiplication at line 25 of the
  routine named EXTRAPOLATE.  The routine EXTRAPOLATE
  was called at line 192 of the routine REFLECTION, which
  in turn was called at line 19 of the main program.
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