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Model Traning gives error

See original GitHub issue

Hi, i tried to train model but it gives this error. i cant train it. i am using python 3.9.2 and tensorflow nightly built. https://pypi.org/project/tf-nightly/

i tried this png for training and created gt.txt

https://d1ly52g9wjvbd2.cloudfront.net/img16/M/O/FF_Modern-Antiqua-RegularA.png

None Traceback (most recent call last): File “C:\Program Files\Python39\lib\runpy.py”, line 197, in _run_module_as_main return _run_code(code, main_globals, None, File “C:\Program Files\Python39\lib\runpy.py”, line 87, in run_code exec(code, run_globals) File "c:\calamari-ocr\Scripts\calamari-train.exe_main.py", line 7, in <module> File “c:\calamari-ocr\lib\site-packages\calamari_ocr\scripts\train.py”, line 367, in main run(args) File “c:\calamari-ocr\lib\site-packages\calamari_ocr\scripts\train.py”, line 357, in run trainer.train( File “c:\calamari-ocr\lib\site-packages\calamari_ocr\ocr\trainer.py”, line 197, in train self._run_train(train_net, train_start_time, progress_bar, self.dataset, self.validation_dataset, training_callback) File “c:\calamari-ocr\lib\site-packages\calamari_ocr\ocr\trainer.py”, line 213, in _run_train train_net.train(train_dataset, val_dataset, checkpoint_params, self.txt_postproc, progress_bar, training_callback) File “c:\calamari-ocr\lib\site-packages\calamari_ocr\ocr\backends\tensorflow_backend\tensorflow_model.py”, line 317, in train predict_func = K.function({t.op.name: t for t in [self.input_data, self.input_length, self.input_params, self.targets, self.targets_length]}, [self.cer, self.sparse_targets, self.sparse_decoded]) File “c:\calamari-ocr\lib\site-packages\calamari_ocr\ocr\backends\tensorflow_backend\tensorflow_model.py”, line 317, in <dictcomp> predict_func = K.function({t.op.name: t for t in [self.input_data, self.input_length, self.input_params, self.targets, self.targets_length]}, [self.cer, self.sparse_targets, self.sparse_decoded]) File “c:\calamari-ocr\lib\site-packages\tensorflow\python\keras\engine\keras_tensor.py”, line 236, in op raise TypeError('Keras symbolic inputs/outputs do not ’ TypeError: Keras symbolic inputs/outputs do not implement op. You may be trying to pass Keras symbolic inputs/outputs to a TF API that does not register dispatching, preventing Keras from automatically converting the API call to a lambda layer in the Functional Model.