Lines missing when viewing PDFs

[GwenMeissner]

I'm trying to view a pdf in Adobe Acrobat X Standard and some of the lines are missing.  When I open the same pdf in both edge and chrome, it works and everything is there.  Also have tried on a second computer that has Acrobat 8 Standard installed, and it has the same problems.  No numbers or letters are missing, just lines.  Both computers are completely up to date.

[Karl Heinz Kremer · Accepted solution]

Are the lines still missing when you change the zoom factor? Sometimes very thin lines fall "between" two columns or rows of pixels, and when you e.g. zoom in, the line will become visible.

[GwenMeissner]

Thank you very much!  That did indeed fix it - had to zoom for 90% to 100%

[kevin5EFD]

Hello, I'm having the same issue, except they don't appear when zooming, editing the pdf or opening it in Illustrator. I had edited a PDF in illustrator yesterday, and sectioned everything into layers, and when I opened it this morning, a few layers were completely gone, and do not show up anywhere. I was wondering what I could possibly do to recover these lost layers, this is very urgent because of a deadline tomorrow.

[kevin5EFD]

It's also very strange because typically PDFs are sectioned into layers when opened in Illustrator, but now that I open this pdf and others I had edited in Illustrator, it's broken every layer's objects into separate layers.