Start by removing all pdfinfo/pdftotext files in your Zotero data directory. Then restart Zotero and reinstall the PDF tools from the Search pane of the preferences.
If that doesn't help, provide a Debug ID for trying to retrieve metadata for an attachment with embedded text that doesn't work.
I am using standalone zotero version 4.0.29.15 on a 2016 mac.
I have found that the "retrieve metadata from PDF" tool has not worked for some time (about a year). Is this a common experience? How can I fix it?
At the moment I get the error "Could not read text from PDF".
Thanks,
Charlie
If that doesn't help, provide a Debug ID for trying to retrieve metadata for an attachment with embedded text that doesn't work.
Thanks so much!
I still get the error occasionally "no matching references found". Presumably this has a different cause.