# DALP-9500 to DALP-9999

Source: https://docs.settlemint.com/docs/api-reference/errors/error-code-reference/dalp-9500-9999
Cause, fix and retry flag for every on-chain contract error with a code from DALP-9500 to DALP-9999.

This page lists the 2 errors in the contract error reference with a code from DALP-9500 to DALP-9999. Match the error's `id`, or its `dalpCode` on a contract error or a failed deployment step, for example `DALP-9545`, to the DALP Code column, then read Retryable and Suggested Fix. The [contract error reference](https://docs.settlemint.com/docs/api-reference/errors/error-code-reference#how-to-use-this-reference) explains each column, including Severity, and the [DALP error index](https://docs.settlemint.com/docs/api-reference/errors) lists the page for every code range.

| DALP Code | Message | Why | Suggested Fix | Severity | Retryable | Solidity Error |
| --- | --- | --- | --- | --- | --- | --- |
| DALP-9545 | The interest day-count convention is not supported. | Interest yield accepts continuous (per second over a 365-day year) or ACT/360 (per completed UTC day over a 360-day year). Any other value is refused. | Choose continuous or act-360, then attach the interest schedule again. | error | No | `InvalidDaycountConvention()` |
| DALP-9562 | This issuer and nonce already anchor a different document. | An entry is identified by its issuer and the nonce reserved for it, and the registry only ever appends. The stored entry differs from this submission in its subject, digest, document type or label (a changed label alone is enough), so this attempt is not a replay of one that landed: either another claim key on the issuer wrote this identifier first, or this submission's content changed since the first attempt. | Reserve a fresh nonce for this document and retry. Do not treat the existing entry as this document's anchor. | error | No | `NonceReused(bytes32)` |

The previous page is [DALP-9300 to DALP-9399](https://docs.settlemint.com/docs/api-reference/errors/error-code-reference/dalp-9300-9399). The next page is [Codes without a number](https://docs.settlemint.com/docs/api-reference/errors/error-code-reference/unnumbered-codes).