PdfError(Decryption(UnsupportedEncryption)) for format PDF-1.7 but not for PDF-1.6

[guymarshall]

I am trying to open a .pdf file using this crate, but I am getting an error "PdfError(Decryption(UnsupportedEncryption))". Linux Mint tells me the file's format is PDF-1.7. Another pdf file that has the format PDF-1.6 opens fine with this crate and I can print the contents of it. The file is not encrypted with a password so I am unsure why it is giving that error.

[jrmuizel]

Can you share the pdf? Can it be read with any of the tools in https://github.com/J-F-Liu/lopdf?

[guymarshall]

Sorry yes here is the PDF file. I have also tried lopdf and no luck!
AQA-8461-SP-2016.PDF

[jrmuizel]

pdf-extract depends on lopdf so this may need to be fixed there before it will work with pdf-extract. I'd suggest filing an upstream bug there.

[guymarshall]

Ok I will do thank you! :)