Hello - have scanned pdfs on pc and recently a number of them will not open. "Error [PDF Structure 40]:Invalid file format" appears and also "Adobe Acrobat reader could not open [.......file.......] because it is either not a supported file type or because th efile has been damaged etc....". Also have sometime error "...%..." reported.
Fortunately many pdfs open fine.
Have reinstalled Acrobat DC but still many pdfs do not open.
It occurs it may be due to a reversion to a restore point that failed to work recently.
A scan of hard drive did not show any issues after this failed restore however a new attempt to restore also failed.
Is this an issue that could indicate an answer?
Need urgent help please.
Thank you.
CD
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