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Undoing a presentation deftype ..

    Date: Thu, 29 Mar 90 12:26:00 EST
    From: buff%pravda@gatech.edu (Richard Billington)

    I accidentally left out the ":no-deftype t" incantation from
    a presentation type I was defining - for which I have a flavor
    of the same name. I was impatient when it was compiling and
    told it to proceed even though it warned me it was going to
    undefine this other (flavor-made) type. So, it's all my fault,
    but it's really a pain because the type 'foo now is thought
    to be a presentation type by the system, and I can't figure
    out how to make it think otherwise - (typep <thing> 'foo) 
    yields "don't do this with a presentation type" even though
    I've since gone and recompiled the foo flavor definition,

    For future reference (I'm going to reboot now - aarrrrrgh)
    is there a way to undo or override this "damage"?

Did you try m-X Kill Definition?

Actually, I don't think that works.  Try (REMPROP FLAVOR-NAME 'DEFTYPE),
which seems to do the right thing.