Error: AttributeError: 'Conv2D' object has no attribute 'inbound_nodes'

[babak-abad]

I'm programming using pycharm 2020 pro and python 3.8. I test different version of keras and python (more than 20 combination of them). In many of them I get error illustrated below. Does it relate to version of keras/tensorflow/python?

error:

AttributeError                            Traceback (most recent call last)

<ipython-input-82-e844c96e1751> in <module>
     17                     normalize_coords=normalize_coords,
     18                     subtract_mean=intensity_mean,
---> 19                     divide_by_stddev=intensity_range)
     20 
     21 # 2: Optional: Load some weights

E:\Projects\ssd_keras-master\models\keras_ssd7.py in build_model(image_size, n_classes, mode, l2_regularization, min_scale, max_scale, scales, aspect_ratios_global, aspect_ratios_per_layer, two_boxes_for_ar1, steps, offsets, clip_boxes, variances, coords, normalize_coords, subtract_mean, divide_by_stddev, swap_channels, confidence_thresh, iou_threshold, top_k, nms_max_output_size, return_predictor_sizes)
    335     anchors4 = AnchorBoxes(img_height, img_width, this_scale=scales[0], next_scale=scales[1], aspect_ratios=aspect_ratios[0],
    336                            two_boxes_for_ar1=two_boxes_for_ar1, this_steps=steps[0], this_offsets=offsets[0],
--> 337                            clip_boxes=clip_boxes, variances=variances, coords=coords, normalize_coords=normalize_coords, name='anchors4')(boxes4)
    338     anchors5 = AnchorBoxes(img_height, img_width, this_scale=scales[1], next_scale=scales[2], aspect_ratios=aspect_ratios[1],
    339                            two_boxes_for_ar1=two_boxes_for_ar1, this_steps=steps[1], this_offsets=offsets[1],

e:\projects\ssd_keras-master\venv\lib\site-packages\keras\engine\topology.py in __call__(self, inputs, **kwargs)

e:\projects\ssd_keras-master\venv\lib\site-packages\keras\engine\topology.py in _collect_previous_mask(input_tensors)

AttributeError: 'Conv2D' object has no attribute 'inbound_nodes'

what version of keras and tensorflow do you use for training? I mean exact numbers of version. Any help will be appreciated...

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