> For the complete documentation index, see [llms.txt](https://docs.viesus.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.viesus.com/support/error-codes/nodejs.md).

# Node.js Error Codes

The Node.js module returns an integer after each enhancement call:

* **`> 0`** — enhancement succeeded; the value is the processing time in milliseconds.
* **`< 0`** — enhancement failed; the value is one of the error codes below.

For symptom-based troubleshooting, see [Troubleshooting](/support/troubleshooting.md).

***

## Error codes

<table><thead><tr><th width="170">Code</th><th>Description</th></tr></thead><tbody><tr><td>-1</td><td>Init failed</td></tr><tr><td>-2</td><td>GUID wrong</td></tr><tr><td>-3</td><td>Internal error</td></tr><tr><td>-4</td><td>Loading image not possible</td></tr><tr><td>-5</td><td>Can't open file</td></tr><tr><td>-6</td><td>File not found</td></tr><tr><td>-7</td><td>File is empty</td></tr><tr><td>-8</td><td>Mem open internal error</td></tr><tr><td>-9</td><td>Enhancement failed — contact <a href="mailto:support@viesus.com">support@viesus.com</a> for further investigation</td></tr><tr><td>-10</td><td>Parameter file not found</td></tr><tr><td>-11</td><td>Parameter file empty</td></tr><tr><td>-12</td><td>Output format not supported</td></tr><tr><td>-13</td><td>Error writing result file</td></tr></tbody></table>

### Additional errors

<table><thead><tr><th width="170">Code</th><th>Description</th></tr></thead><tbody><tr><td>-126</td><td>Enhancement failed — image was already enhanced</td></tr><tr><td>-378</td><td>Enhancement failed — wrong GUID entered</td></tr></tbody></table>

Codes below **`-18`** (other than the named codes above) indicate internal errors. Contact <support@viesus.com> if you receive one.


---

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