netcdf test_vlen2.nc {
types:
  compound x_base_t {
    int x ;
  }; // x_base_t
  x_base_t(*) x_t ;
dimensions:
	d3 = 3 ;
	d2 = 2 ;
variables:
	x_t x(d3, d2) ;

data:

 x =
  {{1}, {3}, {5}, {7}}, {{100}, {200}},
  {{-1}, {-2}}, {{1}, {3}, {5}, {7}},
  {{100}, {200}}, {{-1}, {-2}} ;
}