attempt to select less than one element in integerOneIndex

Question

I am trying to use mdlp package in R to discretize the continuous data that I created as an example.

A=cbind(2,3,6,7,29,56,192,1256)
A=t(A)
mdlp(A)

But I received the following error

Error in cutp[[i]] <- cuts1 : 
  attempt to select less than one element in integerOneIndex
In addition: Warning messages:
1: In min(x) : no non-missing arguments to min; returning Inf
2: In max(x) : no non-missing arguments to max; returning -Inf

Can anyone tell me what is the problem? How come a package cannot handle such a short length of the sequence?