Daniel Hrisca

Benchmark environment * 3.10.8 (tags/v3.10.8:aaaf517, Oct 11 2022, 16:50:30) [MSC v.1933 64 bit (AMD64)] * Windows-10-10.0.22621-SP0 * AMD64 Family 25 Model 80 Stepping 0, AuthenticAMD * numpy 1.23.1 * 15GB...

I guess in mdfr all the data is loaded into the RAM when the file is opened

@morbult please try the development branch code

The source of the problem in your case is that the DataBytes is loaded from the dataframe as a category dtype, instead of as bytearray as is normally is for...

the release comes from this branch https://github.com/danielhrisca/asammdf/tree/Branch_7.4.x

On Windows there are no issues with Python 3.8 Can you try a newer Python version on your setup?

use 64 bit python

https://stackoverflow.com/questions/40018405/cannot-open-include-file-io-h-no-such-file-or-directory

@dhiraj797 the latest asammdf is supported for 64 bit Python >= 3.8

please try the development branch code