R help - May 2009 - Warning trying to plot -log(log(survival)) (John Sorkin)

John,
  Nothing about the data set you posted should give issues in any version of the
package.  The "points <=0" usually arises when the survival curve
drops to zero,
and so log(-log(0)) is being trimmed off the graph by the plot command.  This is
what should happen.  As Thomas pointed out to you earlier, log-log survival 
curves are not that useful and there are now much better methods.
  
   I suspect that the data set you posted and the data set giving the warning 
are not the same.
   
   	Terry T.