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px(1)									 px(1)

Name
       px - Pascal code executor

Syntax
       px [obj[argument...]]

Description
       The command interprets the abstract machine code generated by The first
       argument is the file to be interpreted, and defaults to obj;  remaining
       arguments  are available to the Pascal program using the built-ins argv
       and argc.  The command is also invoked by when running `load and go'.

       If the program terminates abnormally an error  message  and  a  control
       flow  backtrace	are  printed.	The  number of statements executed and
       total execution time are	 printed  after	 normal	 termination.	The  p
       option  of  suppresses  all  of	this except the message indicating the
       cause of abnormal termination.

Restrictions
       Post-mortem traceback is	 not  limited;	infinite  recursion  leads  to
       almost infinite traceback.

Diagnostics
       Most  run-time  error  messages are self-explanatory.  Some of the more
       unusual ones are:

       Reference to an inactive file
	     A file other than input or output was used before a call to reset
	     or rewrite.

       Statement count limit exceeded
	     The  limit	 of 500,000 executed statements (which prevents exces‐
	     sive looping or recursion) has been exceeded.

       Bad data found on integer read
       Bad data found on real read
	     Usually, non-numeric input was found for a	 number.   For	reals,
	     Pascal requires digits before and after the decimal point so that
	     numbers like `.1' or `21.' evoke the second diagnostic.

       panic: Some message
	     Indicates a internal inconsistency detected in probably due to  a
	     Pascal system bug.

Files
       obj	 default object file
       pmon.out	 profile data file

See Also
       pi(1), pix(1)
       "Berkeley  Pascal  User's  Manual,"  Supplementary Documents, Volume 2:
       Programmer

				      VAX				 px(1)

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