Inconsistent "End of file error" on "open for access "myFile.txt"

Question

I have a script that accesses a txt file containing info needed for values in the script. Sometimes the script works flawless, but once I get the "End of file error," it won't work right anymore unless I log out and log back in or if I dump the file and rewrite it. Below is a copy of the portion of script having the problem:
+set _fileRef to open for access "Library:Preferences:MyTextFile.txt" with permission+
+ set ReadMyTextFile to read _fileRef as string+
+ close access _fileRef+
Is there a way to reset the "End of file" status so that I can access it later with the same script in one login session? I have a feeling that the first time it opens, that it reads to the end of the file and then closes the file. When it opens again the script starts to read where it left off at the end of the file. Does that sound right?
Any help would be great.

Answer 1

OK, it looks like if you are going to use the open for access..close access, you need to keep tack of the EOF yourself, so you can just read to the EOF - for example:
<pre title="this text can be pasted into the Script Editor" style="font-family: Monaco, 'Courier New', Courier, monospace; font-size: 10px; padding: 5px; width: 720px; color: #000000; background-color: #E0E0E0; overflow: auto"> set TheOpenFile to open for access (choose file)
try
set SomeText to paragraphs of (read TheOpenFile to eof as text)
close access TheOpenFile
on error
close access TheOpenFile
end try
choose from list SomeText with prompt "File text:" with empty selection allowed
</pre>
If there isn't any particular reason to explicitly open and close the file, you can use something like:
<pre title="this text can be pasted into the Script Editor" style="font-family: Monaco, 'Courier New', Courier, monospace; font-size: 10px; padding: 5px; width: 720px; color: #000000; background-color: #E0E0E0; overflow: auto"> set SomeText to paragraphs of (read (choose file) as text)
choose from list SomeText with prompt "File text:" with empty selection allowed
</pre>
In the above examples I used paragraphs of in order to use the choose from list, since it displays stuff like this a little bit better - see this article for a tutorial on file read/write in AppleScript.