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- 9
 
 - MESSAGE
 **** Escape executed outside of TRY block; CODE = ! (UNWIND 9).
   - CAUSE
 A Pascal "ESCAPE" statement executed but no TRY/RECOVER block was active anywhere in the runtime stack.
 - ACTION
 Put a TRY/RECOVER block around the statement which causes the escape, or remove the "ESCAPE" statement from your code (if possible).''
 
  
 - 10
 
 - MESSAGE
 **** Non-unwindable descriptor during Escape; CODE = ! (UNWIND 10).
   - CAUSE
 The procedure assembled with NO_UNWIND in .callinfo statement, or there was an internal error.
 - ACTION
 Reassemble the procedure without NO_UNWIND, or remove the cause of stack UNWIND (Escape trap).
 
  
 - 11
 
 - MESSAGE
 **** Missing UNWIND descriptor during Escape; CODE = ! (UNWIND 11).
   - CAUSE
 The procedure assembled with "-U" option, or there was an internal error.
 - ACTION
 Reassemble the procedure without "-U" option or remove cause of stack UNWIND (Escape trap).
 
  
 - 19
 
 - MESSAGE
 **** End-of-stack during non-local GOTO (UNWIND 19).
   - CAUSE
 Internal error.
 - ACTION
 Call your Hewlett-Packard Representative.
 
  
 - 20
 
 - MESSAGE
 **** Non-unwindable descriptor found during non-local GOTO (UNWIND 20).
   - CAUSE
 The procedure assembled with NO_UNWIND in .callinfo statement, or there was an internal error.
 - ACTION
 Reassemble the procedure with NO_UNWIND, or remove cause of stack UNWIND (non-local GOTO trap).
 
  
 - 21
 
 - MESSAGE
 **** Missing UNWIND descriptor during non-local GOTO (UNWIND 21).
   - CAUSE
 The procedure assembled with '-U' option, or there was as internal error.
 - ACTION
 Reassemble the procedure without '-U' option, or remove cause of stack UNWIND (non-local GOTO trap).
 
  
 - 30
 
 - MESSAGE
 **** No HEAP allocated to release (UNWIND 30).
   - CAUSE
 Internal error.
 - ACTION
 Call your Hewlett-Packard Representative.
 
  
 - 31
 
 - MESSAGE
 **** HEAP allocation request FAILED. (UNWIND 31).
   - CAUSE
 This is a language construct problem.  There is not enough contiguous HEAP space available, or there was an invalid HEAP request due to an unitialized variable, bad string length, etc.
 - ACTION
 Ensure correctness and/or efficiency of the code.
 
  
  
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