inexplicable error when trying to open Illustrator PDFs in Photoshop

[miken85463333]

I resave AI files in AI PDF format, open the PDF in Photoshop and print from there. Reason: they print incorrect size from AI (about 97%). Clunky but it works, or did until this morning when quite suddenly AI PDFs open with nothing but an error msg "telling me to resave the AI file with "Create PDF Compatible File" option turned on. It IS turned on. This happened first with a 106mb AI file so I thought maybe it's a RAM issue but I tried opening tiny AI PDFs in PS and got the same result. Again, this glitch seems to have come out of nowhere, didn't result from any conscious action on my part. Any suggestions?

[Mylenium]

Nobody can tell you anything without exact system info or other technical details like exact versions of the programs.

Mylenium

[Test Screen Name]

That really is clunky. Try opening and printing with Acrobat instead. If it won't open it either Illustrator is doing something strange.