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

> base::assign(".ptime", proc.time(), pos = "CheckExEnv")
> ### Name: plotAnimatedFlowmap
> ### Title: Generating flow maps and animations based on transition
> ###   probabilities
> ### Aliases: plotAnimatedFlowmap
> ### Keywords: Timeseries_Analysis
> 
> ### ** Examples
> 
> dataset <- data.frame(date = as.numeric(time(EuStockMarkets)),
+                       DAX = EuStockMarkets[, "DAX"],
+                       SMI = EuStockMarkets[, "SMI"],
+                       CAC = EuStockMarkets[, "CAC"],
+                       FTSE = EuStockMarkets[, "FTSE"])
> hvt.results<- trainHVT(dataset,n_cells = 60, depth = 1, quant.err = 0.1,
+                        distance_metric = "L1_Norm", error_metric = "max",
+                        normalize = TRUE,quant_method = "kmeans")
Initial stress        : 0.00078
stress after  10 iters: 0.00033, magic = 0.500
stress after  20 iters: 0.00032, magic = 0.500
> scoring <- scoreHVT(dataset, hvt.results)
Scale for colour is already present.
Adding another scale for colour, which will replace the existing scale.
Scale for x is already present.
Adding another scale for x, which will replace the existing scale.
Scale for y is already present.
Adding another scale for y, which will replace the existing scale.
> cell_id <- scoring$scoredPredictedData$Cell.ID
> time_stamp <- dataset$date
> dataset <- data.frame(cell_id, time_stamp)
> table <- getTransitionProbability(dataset, cellid_column = "cell_id",time_column = "time_stamp")
> plots <- plotAnimatedFlowmap(hvt_model_output = hvt.results, transition_probability_df = table,
+ df = dataset, animation = 'All', flow_map = 'All',fps_time = 1,fps_state =  1,time_duration = 3,
+ state_duration = 3,cellid_column = "cell_id", time_column = "time_stamp")
Warning: Cannot get dimensions of plot table. Plot region might not be fixed
Caused by error in `labs()`:
! could not find function "labs"
Warning: Failed to plot frame
Caused by error in `labs()`:
! could not find function "labs"
Warning: Failed to plot frame
Caused by error in `labs()`:
! could not find function "labs"
Warning: Failed to plot frame
Caused by error in `labs()`:
! could not find function "labs"
Error in `png_dim()`:
! Provided file (/tmp/RtmpKxepJ4/6c50e5a8d61e2/gganim_plot0001.png) does
  not exist
Backtrace:
    ▆
 1. └─HVT::plotAnimatedFlowmap(...)
 2.   ├─gganimate::animate(...)
 3.   └─gganimate:::animate.gganim(...)
 4.     └─args$renderer(frames_vars$frame_source, args$fps)
 5.       └─gganimate:::png_dim(frames[1])
 6.         └─cli::cli_abort("Provided file ({file}) does not exist")
 7.           └─rlang::abort(...)
Execution halted
Examples with CPU (user + system) or elapsed time > 5s
          user system elapsed
clustHVT 4.969  0.511   6.284
msm      4.437  0.090   5.263