## CDSS Request Exceptions

### General server exceptions

Following server exceptions are possible:

| Exception                    | Code | Description                                                  |
|------------------------------|------|--------------------------------------------------------------|
| InvalidRequestException      | 400  | Referral Request object has invalid or unparsable parameters |
| UnprocessableEntityException | 422  | Referral Request object didn't validate with profile         |
| InternalErrorException       | 500  | Any unexpected internal error                                |

### Rule exceptions

If a certain rule cannot be executed an observation without value will be returned. In the observation.dataAbsentReason field will be an error code.


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