| COSVisitorException | An exception that represents something gone wrong when visiting a PDF object. | code | html |
| CryptographyException | An exception that indicates that something has gone wrong during a cryptography operation. | code | html |
| InvalidPasswordException | An exception that indicates an invalid password was supplied. | code | html |
| OutlineNotLocalException | This exception will be thrown when a local destination(page within the same PDF) is required but the bookmark(PDOutlineItem) refers to an external destination or an action that does not point to a page. | code | html |
| WrappedException | An exception that that holds a sub exception. | code | html |
| WrappedIOException | An simple class that allows a sub exception to be stored. | code | html |