I had a case where there were a bunch of hidden characters at the beginning of my .mod file one time, your error line saying “error: ‘rbc_basico_calibrado’ undefined near line 1 column 1” (meaning I think that there is something that Dynare can’t read in the very first character of your very first line) may have a similar cause.
In any case, you should also post your code and any other relevant files needed for estimation (data, steady-state file) so people can look at exactly what’s going on and test things for themselves.