Hi Bruno - I am having a similar issue to Chris Rynne. I am using MacOS Ventura 13.4. I'm able to run the software and import a PDF, but when I start analysis I get an error: 'NoneType' object is not iterable. The same error appears when I run the sample data sheet that comes with the download package, so it is not a problem with how my data sheets are being filled out or scanned. Please let me know if there's anything on my end that can be done to fix this! Thanks, Dennis