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

> ### Name: AncestralRelations
> ### Title: Ancestral Relations
> ### Aliases: AncestralRelations adjacentNodes ancestors children
> ###   descendants markovBlanket neighbours parents spouses
> 
> ### ** Examples
> 
> g <- dagitty("graph{ a <-> x -> b ; c -- x <- d }")


#
# Fatal error in , line 0
# Failed to create ICU collator, are ICU data files missing?
#
#
#
#FailureMessage Object: 0x7ffede570400
==== C stack trace ===============================

    /lib64/libnode.so.64(v8::base::debug::StackTrace::StackTrace()+0x1a) [0x7f5e6eb2a45a]
    /lib64/libnode.so.64(+0x92e8b1) [0x7f5e6e0b28b1]
    /lib64/libnode.so.64(V8_Fatal(char const*, int, char const*, ...)+0x177) [0x7f5e6eb25f57]
    /lib64/libnode.so.64(v8::internal::Collator::InitializeCollator(v8::internal::Isolate*, v8::internal::Handle<v8::internal::JSObject>, v8::internal::Handle<v8::internal::String>, v8::internal::Handle<v8::internal::JSObject>, v8::internal::Handle<v8::internal::JSObject>)+0x473) [0x7f5e6e807413]
    /lib64/libnode.so.64(v8::internal::Runtime_CreateCollator(int, v8::internal::Object**, v8::internal::Isolate*)+0x192) [0x7f5e6e92c4a2]
    [0x22f14d6dc0d8]

 *** caught illegal operation ***
address 0x7f5e6def09a5, cause 'illegal operand'

Traceback:
 1: context_eval(join(src), private$context)
 2: get_str_output(context_eval(join(src), private$context))
 3: ct$eval(paste("global.", name, "=", value))
 4: .jsassign(xv, .jsp("GraphParser.parseGuess(global.", xv, ").toString()"))
 5: doTryCatch(return(expr), name, parentenv, handler)
 6: tryCatchOne(expr, names, parentenv, handlers[[1L]])
 7: tryCatchList(expr, classes, parentenv, handlers)
 8: tryCatch({    .jsassign(xv, as.character(x))    .jsassign(xv, .jsp("GraphParser.parseGuess(global.", xv,         ").toString()"))    r <- structure(.jsget(xv), class = "dagitty")}, error = function(e) {    stop(e)}, finally = {    .deleteJSVar(xv)})
 9: dagitty("graph{ a <-> x -> b ; c -- x <- d }")
An irrecoverable exception occurred. R is aborting now ...