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

> base::assign(".ptime", proc.time(), pos = "CheckExEnv")
> ### Name: setup_disk.frame
> ### Title: Set up disk.frame environment
> ### Aliases: setup_disk.frame
> 
> ### ** Examples
> 
> if (interactive()) {
+   # setup disk.frame to use multiple workers these may use more than two
+   # cores, and is therefore not allowed on CRAN. Hence it's set to run only in
+   # interactive session
+   setup_disk.frame()
+   
+   # use a Shiny GUI to adjust settings
+   # only run in interactive()
+   setup_disk.frame(gui = TRUE)
+ }
> 
> # set the number workers to 2
> setup_disk.frame(2)
Error in get(name, envir = asNamespace(pkg), inherits = FALSE) : 
  object '.slaveRSOCK' not found
Calls: ::: -> get
Execution halted
Error in makeRestartList(...) : 
  Failed to launch and connect to R worker on local machine ‘localhost’ from local machine ‘gimli2’.
 * The error produced by socketConnection() was: ‘reached elapsed time limit’ (which suggests that the connection timeout of 120 seconds (argument 'connectTimeout') kicked in)
 * The localhost socket connection that failed to connect to the R worker used port 37400 using a communication timeout of 120 seconds and a connection timeout of 120 seconds.
 * Worker launch call: '/home/hornik/tmp/R.check/r-devel-gcc/Work/build/bin/Rscript' --default-packages=datasets,utils,grDevices,graphics,stats,methods -e '#label=UNKNOWN:8107:gimli2:hornik' -e 'try(suppressWarnings(cat(Sys.getpid(),file="/home/hornik/tmp/scratch/RtmpGkgMWc/future.parent=8107.1fab1e941fb1.pid")), silent = TRUE)' -e 'parallel:::.slaveRSOCK()' MASTER=localhost PORT=37400 OUT=/dev/null TIMEOUT=120 XDR=TRUE.
 * Worker (PID 20101) was successfully killed: TRUE
 * Troubleshooting suggestions:
   - Suggestion #1: Set 'verbose=TRUE' to see more details.
   - Suggestion #2: Set 'outfile=NULL' to see output from worker.
Calls: setup_disk.frame ... tryCatchList -> tryCatchOne -> <Anonymous> -> <Anonymous>
Execution halted