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Thread: Bad argument type: FILE: nil

  1. #1
    Join Date
    Apr 2015
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    Bad argument type: FILE: nil

    I am running a lisp on a new 64-bit computer. Nothing has changed from my old computer.... a 32-bit. All files are exactly the same and yet when i try and run one of my lisp routines I get this error about Bad Argument type File:nil... There was a previous post about this which had a link but the link doesn't work so I can't see the reply for help. Anyone have any ideas?

  2. #2
    Join Date
    Jan 2010
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    The technical explanation for the error as explained by lisp guru Lee Mac.

    A function requiring a file descriptor argument has been passed an argument of incorrect data type with the value noted in the error message. Usually a result of passing princ, prin1 or print an invalid second argument.
    I'm Reese. Sergeant Tech-Com, DN38416. Assigned to protect you. You've been targeted for termination.

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