| DetachedImageException | 
The exception that is thrown when manipulating detached image. | 
| EncryptionIsNotSupportedException | 
The exception that is thrown when content encryption is not supported. | 
| FontNotFoundException | 
The exception that is thrown when requested font is not found. | 
| ImageEffectsForTextWatermarkException | 
The exception that is thrown when [OfficeImageEffects](../com.groupdocs.watermark.contents/officeimageeffects) is supplied for [TextWatermark](../com.groupdocs.watermark.watermarks/textwatermark). | 
| InvalidPasswordException | 
The exception that is thrown when supplied password is incorrect. | 
| PreviewNotSupportedException | 
The exception that is thrown when a preview image cannot be generated for the content. | 
| TextEffectsForImageWatermarkException | 
The exception that is thrown when [OfficeTextEffects](../com.groupdocs.watermark.contents/officetexteffects) is supplied for [ImageWatermark](../com.groupdocs.watermark.watermarks/imagewatermark). | 
| UnexpectedDocumentStructureException | 
The exception that is thrown when a content cannot be parsed due to unexpected structure. | 
| UnknownLoadOptionsTypeException | 
The exception that is thrown when a document cannot be loaded with supplied [LoadOptions](../com.groupdocs.watermark.options/loadoptions). | 
| UnknownWatermarkOptionsTypeException | 
The exception that is thrown when a watermark cannot be added with supplied [WatermarkOptions](../com.groupdocs.watermark.options/watermarkoptions). | 
| UnsupportedFileTypeException | 
The exception that is thrown when a file cannot be loaded. | 
| WatermarkException | 
Represents base exception in GroupDocs.Watermark product. |