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.
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