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

> ### Name: box_mergetime
> ### Title: Function to combine NetCDF files and simultaneously cut a region
> ###   (and level).
> ### Aliases: box_mergetime
> 
> ### ** Examples
> 
> ## Create an example NetCDF file with a similar structure as used by CM
> ## SAF. The file is created with the ncdf4 package.  Alternatively
> ## example data can be freely downloaded here: <https://wui.cmsaf.eu/>
> 
> library(ncdf4)
> 
> ## create some (non-realistic) example data
> 
> lon <- seq(5, 15, 0.5)
> lat <- seq(45, 55, 0.5)
> time <- c(as.Date("2000-01-01"), as.Date("2001-02-01"))
> origin <- as.Date("1983-01-01 00:00:00")
> time <- as.numeric(difftime(time, origin, units = "hour"))
> data1 <- array(250:350, dim = c(21, 21, 1))
> data2 <- array(230:320, dim = c(21, 21, 1))
> 
> ## create two simple example NetCDF files
> 
> x <- ncdim_def(name = "lon", units = "degrees_east", vals = lon)
> y <- ncdim_def(name = "lat", units = "degrees_north", vals = lat)
> t <- ncdim_def(name = "time", units = "hours since 1983-01-01 00:00:00",
+  vals = time[1], unlim = TRUE)
> var1 <- ncvar_def("SIS", "W m-2", list(x, y, t), -1, prec = "short")
> vars <- list(var1)
> ncnew <- nc_create("CMSAF_example_file_n1.nc", vars)
> ncvar_put(ncnew, var1, data1)
> ncatt_put(ncnew, "lon", "standard_name", "longitude", prec = "text")
> ncatt_put(ncnew, "lat", "standard_name", "latitude", prec = "text")
> nc_close(ncnew)
> t <- ncdim_def(name = "time", units = "hours since 1983-01-01 00:00:00",
+  vals = time[2], unlim = TRUE)
> ncnew <- nc_create("CMSAF_example_file_n2.nc", vars)
> ncvar_put(ncnew, var1, data2)
> ncatt_put(ncnew, "lon", "standard_name", "longitude", prec = "text")
> ncatt_put(ncnew, "lat", "standard_name", "latitude", prec = "text")
> nc_close(ncnew)
> 
> ## Cut a region and merge both example CM SAF NetCDF files into one
> ## output file.  Get path information of working directory with getwd()
> ## command.
> wd <- getwd()
> box_mergetime("SIS", wd, "CMSAF_example_file_n",
+  "CMSAF_example_file_box_mergetime.nc", 8, 12, 48, 52)
Error in R_nc4_create: Permission denied (creation mode was 4096)
Error in nc_create(outfile, c(vars, grid_vars), force_v4 = force_v4) : 
  Error in nc_create!
Calls: box_mergetime -> write_output_file -> nc_create
Execution halted