| Malformed | Indicates that the XML message was not well-formed. Additional information may be provided within the ErrorMessage attribute. |
| SessionFailure-100 | This value is used to indicate that the request version is not supported. |
| SessionFailure-101 | This value is used to indicate that the session has expired. |
| SessionFailure-102 | This value is used to indicate that the session is already closed. |
| SessionFailure-103 | This value is used to indicate that a parameter in the request is not supported. |
| Unknown | Indicates an unknown error. Additional information may be provided within the textual part of the element. |
| UnrecognizedRoot | Indicates an unrecognized payload root element was received. Additional information may be provided within the ErrorMessage attribute. |
| UnrecognizedVersion | Indicates that the version attribute in the Schema element of the Manifest of the header is not recognized. Additional information, such as version number(s) supported, may be provided within the ErrorMessage attribute. |
| Validation | Indicates that a well-formed XML message was sent, but did not pass the validation check. Additional information may be provided within the ErrorMessage attribute. |