Warning messages:
1: In for (i in seq_along(ix)) { :
  closing unused connection 13 (<-localhost.localdomain:11615)
2: In for (i in seq_along(ix)) { :
  closing unused connection 12 (<-localhost.localdomain:11615)
3: In for (i in seq_along(ix)) { :
  closing unused connection 11 (<-localhost.localdomain:11615)
4: In for (i in seq_along(ix)) { :
  closing unused connection 10 (<-localhost.localdomain:11615)
5: In for (i in seq_along(ix)) { :
  closing unused connection 9 (<-localhost.localdomain:11615)
6: In for (i in seq_along(ix)) { :
  closing unused connection 8 (<-localhost.localdomain:11615)
7: In for (i in seq_along(ix)) { :
  closing unused connection 7 (<-localhost.localdomain:11615)
8: In for (i in seq_along(ix)) { :
  closing unused connection 6 (<-localhost.localdomain:11615)
9: In for (i in seq_along(ix)) { :
  closing unused connection 5 (<-localhost.localdomain:11615)
10: In for (i in seq_along(ix)) { :
  closing unused connection 4 (<-localhost.localdomain:11615)
Error in { : task 44 failed - "'breaks' are not unique"
Calls: %dopar% -> <Anonymous>
Execution halted