Package check result: ERROR

Check: CRAN incoming feasibility, Result: NOTE
  Maintainer: ‘Torsten Pook <torsten.pook@wur.nl>’
  
  New maintainer:
    Torsten Pook <torsten.pook@wur.nl>
  Old maintainer(s):
    Torsten Pook <torsten.pook@uni-goettingen.de>
  
  Suggests or Enhances not in mainstream repositories:
    alstructure, visPedigree, miraculix, RandomFieldsUtils, MoBPSmaps
  Availability using Additional_repositories specification:
    alstructure         yes   https://tpook92.github.io/drat/
    visPedigree         yes   https://tpook92.github.io/drat/
    miraculix           yes   https://tpook92.github.io/drat/
    RandomFieldsUtils   yes   https://tpook92.github.io/drat/
    MoBPSmaps           yes   https://tpook92.github.io/drat/

Check: examples, Result: ERROR
  Running examples in ‘MoBPS-Ex.R’ failed
  The error most likely occurred in:
  
  > base::assign(".ptime", proc.time(), pos = "CheckExEnv")
  > ### Name: get.phylogenetic.tree
  > ### Title: Phylogenetic Tree
  > ### Aliases: get.phylogenetic.tree
  > 
  > ### ** Examples
  > 
  > data(ex_pop)
  > get.phylogenetic.tree(ex_pop, gen=1, circular=TRUE)
  Error in get.phylogenetic.tree(ex_pop, gen = 1, circular = TRUE) : 
    Generation of phylogenetic trees requires the NAM R-package!
  Execution halted