Jan Dubois posted about that error on the win32-perl-users list just today. Here's what he said:
This mean you are using an application built with AP822 against an
older version of perl58.dll. AP822 contains all changes from the
Perl 5.8.x maintenance branch that will eventually become 5.8.9.
One of the changes is that the SvIV() macro may now call the
Perl_sv_2iv_flags() function, which does not exist in earlier
5.8.x releases. I gather that either downgrading to ActivePerl build 820, or using a version of PAR::Packer that has been built using ActivePerl build 822 will work.
Cheers,
Rob
Update: Oops ... already linked to by
TGI ... sorry for the needless repetition