cannot move to next after last node about stupidedi HOT 4 CLOSED

    config = Stupidedi::Config.contrib

    config.interchange.register("00200") do
      Stupidedi::Versions::Interchanges::TwoHundred::InterchangeDef
    end

    config.functional_group.register("002001") do
      Stupidedi::Versions::FunctionalGroups::TwoThousandOne::FunctionalGroupDef
    end

    config.transaction_set.register("002001", "SH", "856") do
      Stupidedi::Contrib::TwoThousandOne::TransactionSetDefs::SH856
    end

    strict = true
    builder = Stupidedi::Builder::BuilderDsl.build(config, strict)

builder.ISA("00", " " * 6,             # authorization information
          "00", " " * 6,             # authentication information
          "01", edi_asn_oem.sender_id, # submitter identification
          "01", edi_asn_oem.receiver_id,  # recipient identification
          Time.now.utc,         # date
          Time.now.utc,         # time
          "U",                  # repetition separator
          "00200",              # interchange version
          isa_control_number,          # control number
          "0",                  # acknowledgement request
          "P",                  # usage indicator
          ":")                  # component separator

        builder.GS "PS", edi_asn_oem.sender_id, edi_asn_oem.receiver_id, create_date, create_time, gs_group_control_number, "X", "002001"
        builder.ST "856", st_transaction_set_control_number
        builder.BSN "00", bol, create_date, create_time
        req_date = '140824'
        req_time = '0920'
        builder.DTM "011",req_date, req_time
        builder.HL "1", nil, "S"
          builder.MEA "PD", "G", weight_total, "LB", "0", "0"