[umls-similarity] Problems to get the similarity value

[einsteinsevilla]

hi all,

I have installed UMLS-Similarity on Ubuntu (using Virtual Box), but i have many 
problems to get the similarity of two terms. I need to calculate the value in a 
perl subroutine, so i use the next source code:

        my $umls = UMLS::Interface->new();
        die "unable to create interface" if (!$umls);
        my $wup = UMLS::Similarity::wup->new($umls);
        die "unable to create measure\n" if (!$wup);
        my $cui1 = "C0005767";

        my $cui2 = "C0007634";

        my $value = $wup->getRelatedness($cui1, $cui2);

But i get alwayls:

UMLS-Interface Configuration Information:
(Default Information - no config file)

  Sources (SAB):
     MSH
  Relations (REL):
     PAR
     CHD

  Sources (SABDEF):
     UMLS_ALL
  Relations (RELDEF):
     UMLS_ALL


ERROR: UMLS::Interface::PathFinder->_checkIndex
Index Error (Error Code 9).
Index did not complete. Remove using the removeConfigData.pl program and re-run.

I need a configuration file to run that file, but ¿what file? i don know.. 

And if i run the umls-similatiry.pl, using two terms, the process is very very 
slow (hours), and then show a message to create a indexes. When i write 'yes', 
the process never finish. In general, all process are very slow, i am very 
confused.

Thanks a lot.