Hi again, people I found that there is some problem with rel.tol agrument in the integrate() function. It is not getting found. Maybe because it is a call to .Machine$double.eps? If I specify rel.tol as an argument in gedCDF, everything works, except for those warning messages. Strange. -- Laziness is nothing more than the habit of resting before you get tired. - Jules Renard (writer) Experience is one thing you can't get for nothing. - Oscar Wilde (writer) When you are finished changing, you're finished. - Benjamin Franklin (President)