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

> ### Name: estimate_migration_ABC
> ### Title: Estimates migration parameters using an ABC method.
> ### Aliases: estimate_migration_ABC
> 
> ### ** Examples
> 
> migr <- generate_toy_migration()
> # Argument nb_simul just provide to reduce running time
> estimated_migr <- estimate_migration_ABC( migr, nb_simul = 30 ) 
[1] "    ------ Lenormand et al. (2012)'s algorithm ------"
Error in array(x, c(length(x), 1L), if (!is.null(names(x))) list(names(x),  : 
  'data' must be of a vector type, was 'NULL'
Calls: estimate_migration_ABC ... as.matrix -> as.matrix -> as.matrix.default -> array
Execution halted
Error(s) in re-building vignettes:
  ...
--- re-building ‘introduction.Rmd’ using rmarkdown
Quitting from lines 69-75 (introduction.Rmd) 
Error: processing vignette 'introduction.Rmd' failed with diagnostics:
'data' must be of a vector type, was 'NULL'
--- failed re-building ‘introduction.Rmd’

SUMMARY: processing the following file failed:
  ‘introduction.Rmd’

Error: Vignette re-building failed.
Execution halted