I'm very interested by a solution 'cause I have exactly the same problem...
No one knows?
I have the same problem, too.
Our user has tried all of the following:
- deauthorizing and reauthorizing the Mac
- saving the .acsm file and the opening it, instead of opening it straight away
- downloading the book again
His ADE version is 220.127.116.11765.
ADE is very good at incomprehensible error messages; also at comprehensible but incorrect ones.
I haven't come across this particular one either.
One thing that solves quite a few issues is to use ADE1.7.2;
I have no idea if it will help here but worth a try.
There are lots of bugs in ADE2.0 (and 2.0.1). Try replacing ADE2.0 with the older but more reliable v1.7.2.
(You can have them both installed at once if you like.)
Version 1.7.2, it is a little difficult to find, available on Adobe site for Windows and for Mac.
The forum software is sometimes corrupting the link above. There shouldn't be a blank in 'editio ns.html'. The following redirects to the same page: http://tinyurl.com/diged172
I have this error message with ADE version 4.5.1 and windows 8.1 - very disappointing to see nothing here from adobe to help
Did anyone find a solution. I just used ADE for the first time ever and the first attempt to load a book got this message. Groan.