reproduction Flowgraph for https://github.com/gnuradio/gnuradio/issues/5006

repro5006.grc

options:
  parameters:
    author: marcus
    catch_exceptions: 'True'
    category: '[GRC Hier Blocks]'
    cmake_opt: ''
    comment: ''
    copyright: ''
    description: ''
    gen_cmake: 'On'
    gen_linking: dynamic
    generate_options: qt_gui
    hier_block_src_path: '.:'
    id: repro5006
    max_nouts: '0'
    output_language: python
    placement: (0,0)
    qt_qss_theme: ''
    realtime_scheduling: ''
    run: 'True'
    run_command: '{python} -u {filename}'
    run_options: prompt
    sizing_mode: fixed
    thread_safe_setters: ''
    title: Not titled yet
    window_size: (1000,1000)
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [8, 4.0]
    rotation: 0
    state: enabled

blocks:
- name: freq
  id: variable_qtgui_range
  parameters:
    comment: ''
    gui_hint: ''
    label: Frequency
    min_len: '200'
    orient: QtCore.Qt.Horizontal
    rangeType: float
    start: '1'
    step: '100'
    stop: '16000'
    value: '1000'
    widget: counter_slider
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [328, 4.0]
    rotation: 0
    state: enabled
- name: xmlrpc_client_0
  id: xmlrpc_client
  parameters:
    addr: localhost
    alias: ''
    callback: set_freq
    comment: ''
    port: '8001'
    variable: freq
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [184, 4.0]
    rotation: 0
    state: enabled
connections: []

metadata:
  file_format: 1
  grc_version: v3.11.0.0git-646-g244e92c0

repro5006.svg