PDF file opens without error but gives error 109 when saving
When I open some PDF files (notably bills from Thames Water) in Acrobat Reader, they open correctly and without giving any error messages. However, if I then try to save a copy (since they are generally downloaded from the web), this fails with "error 109". The same happens if I manually copy the document somewhere and then try the same thing. I have tried re-downloading the documents and changing the security settings as suggested in related threads, all to no avail. I also tried validating the document using https://www.pdf-online.com/osa/validate.aspx and this claimed that it conformed to PDF 1.6. Can anyone suggest how to overcome this annoying problem, please, or what to ask the creator of the documents to do so that they work? My Acrobat Reader version is 2024.002.20895 64 bit running under Windows 11.
