Path: utzoo!utgpu!news-server.csri.toronto.edu!qucdn!spraggej
Organization: Queen's University at Kingston
Date: Thursday, 14 Feb 1991 14:18:56 EST
From: John G. Spragge <SPRAGGEJ@QUCDN.QueensU.CA>
Message-ID: <91045.141856SPRAGGEJ@QUCDN.QueensU.CA>
Newsgroups: comp.lang.pascal
Subject: Re: file not found error
References:  <jed1.666500501@ra>

Reference the person who tried to take the EOLN of a file
that was just rewritten:

When you RESET a file, the pointer is set to the beginning, like
so:

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX....
^
An EOLN on this file says "get the current character in the file buffer.
If it is a 13 (carriage return) return true, otherwise, false.

When you REWRITE a file, all characters at and after the file pointer
are undefined. Since the pointer is always (barring a SEEK) at the
end of a reset file, EOF is always true, and EOLN is undefined. I
assume the support routines detected this situation and bounced you.

disclaimer: Queen's University supplies me with computer services, not
            my opinions.

John G. Spragge