| UCS_RET_SUCCESS | Operation successfully completed.  | 
| UCS_RET_ERR_PARAM | At least one parameter exceeds its admissible range.  | 
| UCS_RET_ERR_BUFFER_OVERFLOW | Buffer overflow or service busy.  | 
| UCS_RET_ERR_NOT_AVAILABLE | Functionality not available.  | 
| UCS_RET_ERR_NOT_SUPPORTED | This function is not supported by this derivative of INIC / physical layer / MOST speed.  | 
| UCS_RET_ERR_INVALID_SHADOW | The requested information is not yet available.  | 
| UCS_RET_ERR_ALREADY_SET | The value to be set is already set. The application can therefore be aware that no message will be send to INIC and no callback will be called.  | 
| UCS_RET_ERR_API_LOCKED | INIC performs already requested function.  | 
| UCS_RET_ERR_NOT_INITIALIZED | UNICENS is not initialized.  |