Arduino library error when building a model using the github processing blocks as custom blocks

[JorgeDS]

Question/Issue:
When building a model with custom blocks, arduino fails to compile the library due to some unexpected issues.

I’ve discussed the details in the next forum post, and it would be great if this can be fixed in the future:

Failing to compile model with custom block in arduino

Question/Issue: [Describe the question or issue in detail] For my project, I downloaded the source code of the mfcc processing block and modified the ‘dsp.py’ and ‘parameters.json’ files to apply a digital filter and normalization to the raw data before inputing it to the mfcc extraction process. I was able to use the custom block to build and download my model. However, when I want to compile a sketch using my model in arduino, I get the error: undefined reference to extract_mfcc_custom_fea…