Running examples in 'chronochrt-Ex.R' failed
The error most likely occurred in:

> base::assign(".ptime", proc.time(), pos = "CheckExEnv")
> ### Name: geom_chronochRt
> ### Title: A chronological chart
> ### Aliases: geom_chronochRt
> 
> ### ** Examples
> 
> 
> # Create example data
> library(ggplot2)
> 
> chrons <- data.frame(region = c("A", "B", "B", "B", "A"),
+                      name = c("a", "a", "1", "2", "b"),
+                      start = c(-100, -100, -100, "0/50", "50_100"),
+                      end = c("50_100", 150, "0/50", 150, 200),
+                      level = c(1, 1, 2, 2, 1),
+                      add = FALSE)
> 
> ggplot(chrons) +
+ geom_chronochRt(aes(name = name, region = region, level = level,
+                     start = start, end = end, add = add))
Error in `geom_chronochRt()`:
! Problem while converting geom to grob.
i Error occurred in the 1st layer.
Caused by error in `draw_panel()`:
! object 'new_data_frame' not found
Backtrace:
     x
  1. +-base (local) `<fn>`(x)
  2. +-ggplot2:::print.ggplot(x)
  3. | +-ggplot2::ggplot_gtable(data)
  4. | \-ggplot2:::ggplot_gtable.ggplot_built(data)
  5. |   \-ggplot2:::by_layer(...)
  6. |     +-rlang::try_fetch(...)
  7. |     | +-base::tryCatch(...)
  8. |     | | \-base (local) tryCatchList(expr, classes, parentenv, handlers)
  9. |     | |   \-base (local) tryCatchOne(expr, names, parentenv, handlers[[1L]])
 10. |     | |     \-base (local) doTryCatch(return(expr), name, parentenv, handler)
 11. |     | \-base::withCallingHandlers(...)
 12. |     \-ggplot2 (local) f(l = layers[[i]], d = data[[i]])
 13. |       \-l$draw_geom(d, layout)
 14. |         \-ggplot2 (local) draw_geom(..., self = self)
 15. |           \-self$geom$draw_layer(...)
 16. |             \-ggplot2 (local) draw_layer(..., self = self)
 17. |               \-base::lapply(...)
 18. |                 \-ggplot2 (local) FUN(X[[i]], ...)
 19. |                   +-rlang::inject(self$draw_panel(data, panel_params, coord, !!!params))
 20. |                   \-self$draw_panel(data, panel_params, coord, minimal = FALSE, year_lim = NULL)
 21. |                     \-chronochrt (local) draw_panel(...)
 22. \-base::.handleSimpleError(...)
 23.   \-rlang (local) h(simpleError(msg, call))
 24.     \-handlers[[1L]](cnd)
 25.       \-cli::cli_abort(...)
 26.         \-rlang::abort(...)
Execution halted