Transmitting training data to Python failed.

[Lemon]

Hi，I recently build a convolutional neural network，however, an error occurred in Keras deep learning network. I can successfully run the example on KNIME workflow(Train mnist classifier). So I do not know how to resolve my workflow.

[ScottF]

Hi @Lemon and welcome to the forum.

What is the error message displayed in the console, or when you mouseover the red X on the Learner node?

[Lemon]

The console said：
WARN Keras Network Learner 3:93 E:\ANACONDA-python\envs\py3_knime_dl\lib\site-packages\keras\engine\saving.py:292: UserWarning: No training configuration found in save file: the model was not compiled. Compile it manually.
ERROR Keras Network Learner 3:93 Transmitting training data to Python failed.
ERROR Keras Network Learner 3:93 Execute failed: An error occured during training of the Keras deep learning network. See log for details.

[Lemon]

Hi，if you have any idea please tell me soon, thank you!

[ScottF]

I’m a bit baffled by the error messages here, not having seen them before. I gather you were able to run the standard MNIST workflow, but you are now having problems after you made some changes to the structure and/or configuration of the layers, is that correct?

Could you export and upload your actual workflow instead of just a screenshot? That might help.

[Lemon]

Yes，I only add two “String Manipulation” in the workflow.
My workflow is as followed.

CNN-text-SE – lemon

The size of 600 pictures is 6804804. Is it too big to execute?

[mlauber71]

@Lemon your sample workflow does not contain any data

[Lemon]

I can‘t upload the data,cause the workflow uploaded in KNIME hub limits 50MB. Or I should upload some files? But I don’t know how to do.

[ScottF]

That could be the issue. If I recall, the size of the MNIST digits is quite small, something like 25x25. The Keras Input Layer explicitly defines the size, and yours are much larger of course.

[Lemon]

Thanks for your attention, I have reduced the size of my images by using “image resize”. And the issues have been solved( [Transmitting training data to Python failed.]).