the '_new_data_item' data item could not be added to a loop structure containing the '_unlooped_data_item' data item -- the '_unlooped_data_item' data item was not found in a loop structure
{
   "inloop" => {
      "_a"  => "0",
      "_b"  => "0",
      "_c"  => "0",
   },
   "loops" => [
      #   0:
      [ "_a", "_b", "_c" ],
   ],
   "precisions" => {
      "_a"  => [ undef, undef, undef, undef, undef ],
      "_b"  => [ undef, undef, undef, undef, undef ],
      "_c"  => [ undef, undef, undef, undef, undef ],
      "_unlooped_data_item" => [ undef ],
   },
   "tags" => [ "_a", "_b", "_c", "_unlooped_data_item" ],
   "types" => {
      "_a"  => [ "INT", "INT", "INT", "INT", "INT" ],
      "_b"  => [ "INT", "INT", "INT", "INT", "INT" ],
      "_c"  => [ "INT", "INT", "INT", "INT", "INT" ],
      "_unlooped_data_item" => [ "FLOAT" ],
   },
   "values" => {
      "_a"  => [ "5", "4", "3", "2", "1" ],
      "_b"  => [ "1", "2", "3", "4", "5" ],
      "_c"  => [ "3", "3", "2", "3", "3" ],
      "_unlooped_data_item" => [ "42" ],
   },
},
#-------------------------
