> ## Documentation Index
> Fetch the complete documentation index at: https://docs.datachecks.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Error Codes

> Reference for all error codes returned by the Datachecks platform.

Error codes follow the format `DCS-<component>-<category>-<number>`. Each code is accompanied by a short name and a human-readable message.

## SDK user errors

Errors caused by invalid configuration or input provided to the SDK.

| Code               | Name                         | Message                                               |
| ------------------ | ---------------------------- | ----------------------------------------------------- |
| `DCS-SDK-USER-001` | `SDK_SOURCE_TARGET_MISSING`  | Source or target columns are missing.                 |
| `DCS-SDK-USER-002` | `SDK_UNSUPPORTED_PK`         | Unsupported primary key.                              |
| `DCS-SDK-USER-003` | `SDK_COLUMN_NOT_FOUND`       | Column not found in source or target.                 |
| `DCS-SDK-USER-004` | `SDK_INVALID_FILTER`         | Invalid filter query provided.                        |
| `DCS-SDK-USER-005` | `SDK_INVALID_TRANSFORMATION` | Invalid transformation rule.                          |
| `DCS-SDK-USER-006` | `SDK_TRIM_INT`               | Cannot apply trim on integer columns.                 |
| `DCS-SDK-USER-007` | `DB_CREDENTIAL_ERROR`        | Authentication failed. Please check your credentials. |

## SDK extraction errors

Errors encountered when the SDK attempts to connect to or read from a database.

| Code               | Name                    | Message                                           |
| ------------------ | ----------------------- | ------------------------------------------------- |
| `DCS-SDK-EXTR-003` | `DB_HOST_UNREACHABLE`   | Database host could not be reached.               |
| `DCS-SDK-EXTR-004` | `DB_CONNECTION_TIMEOUT` | Connection to the database timed out.             |
| `DCS-SDK-EXTR-005` | `DB_DRIVER_ERROR`       | Database driver configuration issue.              |
| `DCS-SDK-EXTR-006` | `DB_NOT_FOUND`          | Target database does not exist.                   |
| `DCS-SDK-EXTR-007` | `DB_SCHEMA_NOT_FOUND`   | The specified schema could not be found.          |
| `DCS-SDK-EXTR-008` | `DB_PERMISSION_DENIED`  | You don't have permission to access the resource. |

## Job errors

Errors that occur during job creation or execution.

| Code               | Name                   | Message                                         |
| ------------------ | ---------------------- | ----------------------------------------------- |
| `DCS-JOB-COMM-001` | `JOB_HTTP_ERROR`       | Failed to create job due to connection error.   |
| `DCS-JOB-EXTR-001` | `JOB_DATASOURCE_ERROR` | Datasource connection error while creating job. |

## Datasource errors

Errors related to datasource connectivity and access.

| Code               | Name                    | Message                                  |
| ------------------ | ----------------------- | ---------------------------------------- |
| `DCS-SBR-USER-001` | `DS_CREDENTIAL_ERROR`   | Invalid datasource credentials.          |
| `DCS-SBR-USER-002` | `DS_PERMISSION_ERROR`   | Insufficient permissions for datasource. |
| `DCS-SBR-EXTR-001` | `DS_DB_NOT_FOUND`       | Datasource database not found.           |
| `DCS-SBR-EXTR-002` | `DS_SCHEMA_NOT_FOUND`   | Datasource schema not found.             |
| `DCS-SBR-EXTR-003` | `DS_HOST_RESOLVE_ERROR` | Datasource host could not be resolved.   |

## Generic errors

| Code               | Name            | Message                    |
| ------------------ | --------------- | -------------------------- |
| `DCS-COM-COMM-000` | `UNKNOWN_ERROR` | An unknown error occurred. |