: It also says the file is corrupted and unreadable. :(
(disclaimer: I dont know Pascal. I might be able to help out as it is
more of a generic windows problem.)
Two possibilities that I can think of:
Try copying the file from your h drive to your local machine. If you get an error from Windows when copying, see (2). If not, try to open the file in notepad, and let us know what happens. If you still get an error, go on to number (2).
Notepad, as a plain text editor, can open up the file in different character sets and formats (binary and text).
You can also try opening up the file using DOS EDIT command (Its a text based graphical DOS text editor that comes with windows). To run it, just type "edit" in the run box (Windows key+r; or run it via command line. It supports both keyboard and mouse input)
If it still fails to open, odds are the file structure is corrupt (All text files in Windows must end in a EOF byte (0xff). Text editors use it to determine the end of text files. If the file structure is corrupt, then..well...
I do hope you backed up your source files...
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