error: The file contains an unrecognized object about pyreadr HOT 7 OPEN

From the Readme, known limitations section:

S4 Objects and probably other kind of objects, 
including those that depend on non base R 
packages (Bioconductor for example) cannot 
be read. The error code in this case is as follows:

"pyreadr.custom_errors.LibrdataError: 
The file contains an unrecognized object

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How to solve it? thank you @ofajardo

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No solution at the moment. The issue is tracked here: WizardMac/librdata#16

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I have run into this same issue and as far as I can tell, my data has no S4 objects or any unusual object types. Any thoughts on what else could be the issue?

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Please share the file. If I cannot reproduce it I cannot debug.

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Unfortunately the data contains personal health information and cannot be shared. I have an alternative versions of the data (same object types) that does not run into issues. If I am able to create the a version with fake data that reproduces the issue I will share. Thanks.

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I think I was able to resolve the issue. Seems to have come down to two things. It had an issue with the object being type "data.frame". However, as a "data.table" "data.frame" I no longer had the error. However, after this was resolved, the kernel would always reset. I found that the data had factor variables with NA coded as a level. This seemed to cause the kernel to reset

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