[Bioperl-l] met a problem when run Bio::Tools::Run::Phylo::PAML::Yn00

[kevin fan]

Dear all,
i am using Bio::Tools::Run::Phylo::PAML::Yn00  to calculate Ka/Ks ratio of
pairwise sequences.
bioperl version is 1.6, and PAML version is 4.2

when i run the Bio::Tools::Run::Phylo::PAML::Yn00 , it warns:

-------------------- WARNING ---------------------
MSG: There was an error - see error_string for the program output
---------------------------------------------------

------------- EXCEPTION: Bio::Root::NotImplemented -------------
MSG: Unknown format of PAML output did not see seqtype
STACK: Error::throw
STACK: Bio::Root::Root::throw
/usr/local/share/perl/5.10.0/Bio/Root/Root.pm:359
STACK: Bio::Tools::Phylo::PAML::_parse_summary
/usr/local/share/perl/5.10.0/Bio/Tools/Phylo/PAML.pm:441
STACK: Bio::Tools::Phylo::PAML::next_result
/usr/local/share/perl/5.10.0/Bio/Tools/Phylo/PAML.pm:257
STACK: kaks.pl:10
----------------------------------------------------------------