The error is thrown by the IDispatch implementation of your OLE server. Perl and Win32::OLE are just reporting the error.

But anyways, the correct way to specify a "Nothing" pointer with Win32::OLE is: 

    use Win32::OLE::Variant qw(nothing);
    # ...
    $OleObj->Method($strFirstArg, nothing);

[download]
where nothing() really is just a convenience function for Win32::OLE::Variant->new(VT_DISPATCH)

In reply to Re: OLE optional parameter required by jand
in thread OLE optional parameter required by Anonymous Monk

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