Hello ,
This error can occur for a number of reasons. One reason found during development was the use of non-lower ASCII characters in text fields associated with the document or its contents. For example, the error can occur in the name of a Multistate Object that is part of a slideshow. Look for this usage in some page element, or proceed to the binary isolation method described in the next paragraph.
Other reasons could cause the same error. Divide your content in two and look to see if only one half fails. If so, continue this binary isolation method. Once you identify a specific element that is failing, try creating a similar element in a new document and see if it works. If so, compare the differences and change the offending element to bring it more in line with the working content.
Laxman
