More than likely they are not InDesign files, or (much less likely) there also happens to be a lock file in the same folder...
I'm pretty sure they are indesign files. They sent us a batch of others which also open. The other batch appear to be comps. These are final production files.
Strangely, I'm also having problems with some Photoshop files they gave us. I wonder if they were all somehow corrupted. I vaguely recall a conversation about a special plug in. But, it was so long ago . . .
Anyway, is there some way to ID the plug in this message says could be missing?
If it really were a missing plugin, ID would normally identify the plugin.
While it's possible it's file corruption, 99.9% of the time it turns out the files are not what you think they are, especially if they have no file extensions (and even if they do when sombody just renamed them thinking that would convert them).
Open one in a plain text editor and paste the first two or three lines here.
Thanks for the tip.
I opened one of the failing files and an openable one in BBEdit. They look nothing alike. Below is the failing one.
Still, this is weird. The file has an indd extension. And, it looks like it was packaged by InDesign. It's in a folder with a Links folder and a Fonts folder. Could it be so old that it's unopenable by CS6?
∑µ˝∂ µ∂µ∑µ∑µ˝∂ ¥∑∂˛µ ¥µ∑≥∂∂∑¥∑∑µµ∑∑µ∂∑∏≥∂¥∑∂˛¥ ≤≠∞≠´¶ôéåäéâ˛ÖIàçêôúõùú†ùù††¢•¶™≠¨ØØ≥¥µ∑∏π∏ªºææøø¿¿¡¬√√≈»…≈…… ÕÃÃÕÕŒ“œ”œ–ŒÃÕÀÕ «ÃŒÕŒ–”——˝”
’””‘”’’”÷◊“˛’"‘”◊›‰ÁÎÎÏÎÌÏÎÏÏËÂ‰Â‚Ê‚„„‚„‡‚‡ﬂ„‚ﬂ‡ﬂ˝·ﬂ˛‡ „ﬂ‡ﬂ˝‡1·„‚‚ﬂ‚‡‚·„„‰„‚ÊÂ·„ﬂŸƒ´†òãÅÑáäâåçèìíòñúõ†õû†¢£§••§ß˛® ©™©≠´©™´˛≠ ÆÆ™™©≠≠¨≠ØÆØØ˛Æ¸Ø,Æ∞Ø≠∞Æ±∞±∞≠ØØ∞ÆØØÆ≤Ø∞∞≠±±∞≤±≥≤±±≤∞¥±≥±¥≥≤∞¥≤±˝¥+≥µ∂¥µµ¥¥∂µ∂∑∂π∫∂∑ππªº∫π ººΩææΩ¿¬¡¡√¡√¡¬¡ƒ∆≈∆≈˝«
…» ÀÃÕœÕÕœ–œŒ–˛œ#Œœ—“—–“”œœ——–—–”‘‘ÿ÷ÿ⁄Ÿ€‹ﬁ‡„‰ÂÈÍÍÏÓÓ˚ÔÅÒ˚Ô ÓÏÏÊÈË‰‡ﬁŸ◊”À¿√¬¡ææΩææ˛Ω ¿Ωøø¿Ωø¡¿Ω¿øæºæΩææººøø¿º˛Ω æ¬πºΩøø˛æ øøææøΩΩ≈ºΩΩøΩ˛æpπΩøæøæΩΩæººææøø¿ΩΩºøƒ¡¿æøøΩøΩ¿æ¿øΩæø¿øæøøæ¡æ¡øæøø¡ºææ¬æøø¡æ√¬√¡¬¡¡¬¬¡√¡¬√ «¬√…≈ƒƒ¬¡«¬¬ƒø√æ∆¬¬√√ƒ√≈¡¡¿≈√√¿√¬√√¿√√¡‚•ˇ ⁄ÃÀ ÀÕ ÀÀ À » ÀÕÃÀ…»ÀÃÀ˛ÃN ÃÀÃÃ»…À…ÀÀ ……»«»……»««∆…«∆««≈∆«»√∆√√¿ƒƒ≈¬¬√æ¡¿øΩ¿øæΩªºæ∫πº∫∑∑π∫∏∂∏∫µ∑∂∑∂∑∑∂∑∂∑¥˛∂¥˝∂Pµ∑∂¥∂µ≥µ∏≥∑µ∂≥∂∏ ∑∑µ∂µµ∂∑¥¥≥∂∂µ∂¥≤≠≠®©¶ôçããèäÜÜáâéëôùúûù°ûû°°£ßß´Æ≠Ø∞¥µ∑π∫ª∫Ωæøø¡¡˛¬
If that's an InDesign file, it's corrupt. That doesn't have the right header format, and it doesn't look like any file I recognize.