Dear all,

I had some interest by other members of evoldir to know the answer to my 
question regarding the error running MEDUSA in R. Fortunately I had a 
couple of very useful comments and am able to run it now. Here are the two 
comments:

Hi Ramiro,

I was having this same problem, and I found that it has to do with the 
table layout.  In runMedusa, it inserts a column of tip ages (which in 
your case would be all zeros), but in summaryMedusa it does not insert 
this same column but the program expects that column in order to run. 
Its a simple enough problem to fix.  I just inserted a column of zeros, 
but when I mentioned this problem to Luke Harmon, he provided scripts 
that fixed the issue.  I've attached his scripts to this email. Just 
load these into R and that should fix the problem.

Good luck!

cheers,
Elizabeth

Hi Ramiro,

This is a bug in the current version of Medusa. Expect a new version soon. 
In the meantime, you can source the attached files and things should work.

Luke

Thanks a lot for the replies and hope that it helps other people.

Cheers,

Ramiro

Dr. Ramiro Morales-Hojas
Molecular Evolution lab
IBMC-Instituto de Biologia Molecular e Celular
Rua do Campo Alegre 823
4150-180 Porto
Portugal

Tel.: +351 226 074 900 extension 1612
rmhojas@ibmc.up.pt

rmhojas@ibmc.up.pt