''there was an error opening this...

I get the following message every time I try an open some of my saved PDF files in Adobe Reader 9

''there was an error opening this document. the root object is missing or invalid.''

these files are not down loaded from a website, they are files I greated some time back and I have not opened in a while.

I am runing window XP and this dos not happen with all my PDF files.

can you help.

James

''there was an error opening this...

Sounds like the files are corrupt. Time to restore them from a good backup.