[R] error message obtained when plotting survival curves (error not previously obtained)

[Bob Green]

Hello,

I now receive an error message when obtaining a survival plot, which 
was not previously received with the same code. I recently updated 
all my packages. It does not seem to be a peculiarity of my data as I 
receive the error using data available in R. A plot is produced but I 
am uncertain regarding the error message.



 > library(surv2sample)
 > data(gastric)
 > fit <- survfit(Surv(time, event) ~ treatment, data = gastric)
Error in get(x, envir = ns, inherits = FALSE) :
   variable "survfit.km" was not found
 > #Default plot:
 > plot(fit)


regards

Bob Green