moltemplate

and I am still getting an error that says the boundarys were not specified.

I'm sorry. My fault! We need to supply a 3rd dimension. Try:

write_once("Data Boundary") {
    0 31.973657907721396 xlo xhi
    0 29.82 ylo yhi
    0 50.0 zlo zhi
  }

Change "50.0" to whatever you like.