Running examples in ‘randomForestSRC-Ex.R’ failed
The error most likely occurred in:

> ### Name: rfsrc
> ### Title: Fast Unified Random Forests for Survival, Regression, and
> ###   Classification (RF-SRC)
> ### Aliases: rfsrc rfsrc.cart get.cindex get.mv.error get.mv.error.block
> ###   get.mv.formula get.mv.predicted get.mv.vimp randomForestSRC
> ### Keywords: forest
> 
> ### ** Examples
> 
> ##------------------------------------------------------------
> ## survival analysis
> ##------------------------------------------------------------
> 
> ## veteran data
> ## randomized trial of two treatment regimens for lung cancer
> data(veteran, package = "randomForestSRC")
> v.obj <- rfsrc(Surv(time, status) ~ ., data = veteran, 
+                    ntree = 100, block.size = 1)
> 
> ## print tree number 3
> plot(get.tree(v.obj, 3))
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Error in num_children[[from_node]] : no such index at level 1
Calls: plot -> get.tree -> lapply -> FUN
Execution halted